PTO Shaft Tubes

PTO shaft tubes are the structural backbone of every power take-off driveline, transmitting rotational energy from the tractor PTO output to the driven implement. Available in five distinct profile geometries — triangular, lemon, star, rectangular, and hexagonal — these cold-drawn steel tubes ensure precise torque transfer, axial telescoping, and reliable protection of the inner universal joint shaft across Series 1 through Series 50 applications. Engineered for Australian broadacre, dairy, horticultural, and mixed-farming operations, our PTO shaft tubes deliver direct-fit compatibility with leading OEM drivelines while meeting ISO 500 dimensional standards.

Power System Selection Essentials — PTO Shaft Tube

Applicable to: Hay balers, rotary cutters, feed mixers, slashers, grain augers, post-hole diggers, fertiliser spreaders, mulchers, irrigation pumps, silage choppers, and more.

PTO Shaft Tubes - Triangular, Lemon, Star, Rectangular, Hexagonal profiles for agricultural driveline applications in Australia

PTO Shaft Tube — Premium Power Take-Off Driveline Tubes for Australian Agriculture

High-strength cold-drawn steel PTO tubes in triangular, lemon, star, rectangular & hexagonal profiles. Direct-fit replacement for Series 1–50 agricultural PTO drivelines. Supplied by GBC (General Bearing Company Pty Ltd), EVER-POWER Group’s Australian agency.

Product Overview: What Is a PTO Shaft Tube?

A PTO shaft tube — also called a PTO driveline tube, power take-off shaft housing, or implement shaft tube — is the outer or inner telescoping sleeve that forms the main structural body of a PTO drive shaft assembly. It slides over its mating profile (outer tube over inner tube) to allow length adjustment while maintaining positive torque engagement through its profiled cross-section. The tube transfers rotational power from the tractor’s PTO output stub to the implement’s input shaft, accommodating the three-point-hitch travel through its telescopic action.

Every PTO shaft tube is precision cold-drawn from medium-carbon or alloy steel to achieve tight dimensional tolerances, uniform wall thickness, and a smooth surface finish that minimises friction during telescoping. Profile geometry — whether triangular, lemon, star, rectangular, or hexagonal — determines the torque capacity, angular misalignment tolerance, and wear characteristics of the driveline.

⚙ Core Function

Transmits rotational torque while allowing axial telescoping between tractor and implement during three-point-hitch movement.

⚡ Key Advantage

Cold-drawn profiles provide precise fit, high torque density, and long telescoping life with minimal radial play.

🌎 Applications

Hay balers, rotary cutters, feed mixers, grain augers, fertiliser spreaders, post-hole diggers, slashers, mulchers, and more.

Technical Specifications — PTO Shaft Tube Dimensions

The following tables present the complete dimensional data for all five PTO shaft tube profile types. Each series designation corresponds to standard cross-kit compatibility (universal joint cross and bearing kit pairing). Outer tubes telescope over inner tubes; always confirm both outer and inner profile dimensions when ordering replacement PTO tubing.

▲ Triangular Profile PTO Tubes

Triangular tubes feature a three-lobe cross-section offering smooth telescoping action and balanced torque distribution. Widely used in light-to-medium duty PTO drivelines for mowers, tedders, and small balers.

triangular profile pto tubes

Series Cross Kit Dia. (mm) Outer Tube Code Inner Tube Code Outer Width (mm) Inner Width (mm)
1 54 x 22 1.03 1.04 32.4 26.6
2 61.3 x 23.8 2.03 2.04 36.1 29
3 70 x 27 3.03 3.04 43.4 36.1
4 74.6 x 27 4.03 4.04 43.4 36.1
5 80 x 30.2 5.03 5.04 51.3 44.7
6 92 x 30.2 6.03 6.04 53.6 44.7
7 106.5 x 30.2 7.03 7.04 53.6 44.7
8 106.5 x 35 8.03 8.04 62.7 53.6
9 108 x 41 9.03 9.04 62.7 53.6

🍋 Lemon Profile PTO Tubes

Lemon-shaped (also called double-D or oval-lobe) PTO tubes provide excellent self-centring during telescoping and are favoured for medium-duty implements including rotary rakes, spreaders, and disc mowers.

lemon profile pto tubes

Series Cross Kit Dia. (mm) Outer Tube Code Inner Tube Code Outer Dims (mm) Inner Dims (mm)
1 54 x 22 1.03L 1.04L 30 x 39 30.8 x 23.7
2 61.3 x 23.8 2.03L 2.04L
3 70 x 27 3.03L 3.04L 41.2 x 40.1 34.5
4 74.6 x 27 4.03L 4.04L
5 80 x 30.2 5.03L 7.04L
6 92 x 30.2 6.03L 6.04L 57.5 x 48 x 49 39.5
32 76 x 32 32.03L 32.04L

★ Star Profile PTO Tubes

Star-profile (multi-lobe) tubes deliver higher torque capacity than triangular profiles and provide excellent angular compensation. Available from Series 6 through Series 50 for medium-to-heavy-duty agricultural drivelines including round balers, feed mixers, and silage choppers.

star profile pto tubes

Series Cross Kit Dia. (mm) Outer Tube Code Inner Tube Code Outer Profile Dims Inner Profile Dims
6 92 x 30.2 6.03ST 6.04ST 60.8 x 55.6 51.4 x 47.4
7 106.5 x 30.2
7N 94 x 35
8 106.5 x 35
36 89 x 36 51.4 x 37.1
38 105.6 x 38
9 108 x 41
10 118 x 41 10.03ST 10.04ST 71.4 x 67.5 60 x 56.4
42 104.5 x 42
50 118 x 50 71.4 x 57.5 46

■ Rectangular Profile PTO Tubes

Rectangular (square-section) PTO tubes provide a large contact area for reliable torque transfer and are often used on older European-designed implements. Their simple geometry makes them easy to manufacture and inspect.

rectangular profile pto tubes

Series Cross Kit Dia. (mm) Outer Tube Code Inner Tube Code Outer Dims (mm) Inner Dims (mm)
1 54 x 22 1.03R 1.04R 34 x 32 25 x 23
2 61.3 x 23.8 2.03R 2.04R 36 x 36 28 x 28
3 74.6 x 27 3.03R 3.04R
4 74.6 x 27 4.03R 4.04R
5 80 x 30.2 5.03R 5.04R 43 x 41 34 x 32
6 92 x 30.2 6.03R 6.04R
32 76 x 32 32.03R 32.04R

⬢ Hexagonal Profile PTO Tubes

Hexagonal (six-sided) PTO tubes are designed for high-horsepower applications where maximum torque capacity and compactness are critical. Available in 40HP through 90HP rated driveline configurations.

hexagonal profile pto tubes

Series Cross Kit Dia. (mm) Outer Tube Code Inner Tube Code Outer Dims (mm) Inner Dims (mm)
40HP 54 x 57 x 92 HT.03T1 HT.04T1 35.5 x 34.5 / OD 50 35 x 34 / ID 23
50HP 32 x 57 x 92
80HP 35 x 106.5 HT.03 HT.04 45.5 x 44.5 / OD 60 45 x 44 / ID 28
90HP 35 x 106.5

How a PTO Shaft Tube Works — Operating Principle & Structural Components

A PTO drive shaft assembly consists of two primary telescoping tubes — the outer tube and the inner tube — connected at each end to a universal joint (U-joint or cross and bearing kit). The profiled cross-section of each tube (triangular, lemon, star, rectangular, or hexagonal) ensures positive engagement: the inner tube slides inside the outer tube so that rotational torque is transmitted through the mating profile surfaces while axial (telescoping) movement remains free.

During operation, the tractor’s PTO output stub rotates at a standardised speed (typically 540 RPM or 1000 RPM). This rotation passes through the first U-joint, into the outer PTO shaft tube, across the telescoping section, into the inner tube, through the second U-joint, and finally into the implement’s input shaft. The telescoping action compensates for the changing distance between tractor and implement as the three-point hitch raises, lowers, or articulates during fieldwork.

Outer Tube

The female sleeve that receives the inner tube. Features the profiled bore that mates with the inner tube’s external profile.

Inner Tube

The male tube that slides into the outer tube. Its external profile matches the outer bore for positive torque engagement.

Cross & Bearing Kit

Universal joint assemblies (cross kits) at each end allow angular misalignment between tractor PTO and implement input shaft.

🛡

Safety Shield

The plastic guard that encloses the rotating PTO shaft assembly, preventing contact with the spinning driveline.

Core Advantages of Our PTO Shaft Tubes

Precision Cold-Drawn Manufacturing

Every PTO tube is cold-drawn from seamless or welded steel preforms through hardened dies, achieving dimensional tolerances within +/-0.1 mm. This ensures consistent telescoping fit, uniform wall thickness, and a smooth surface finish that minimises friction and wear during operation.

💪

High Torque Capacity Across All Profiles

From light-duty Series 1 triangular tubes through to heavy-duty Series 50 star tubes, our range covers PTO driveline torque requirements from 200 Nm to well over 3,000 Nm. Star profiles distribute load across multiple contact surfaces simultaneously, preventing localised stress concentrations.

🔄

Smooth Telescoping Action

The cold-drawn surface finish (Ra less than 1.6 um) combined with recommended periodic greasing ensures low-friction telescoping throughout the service life. Hardened inner surfaces resist galling even under high axial loads encountered during tight-turn headland manoeuvres.

🌍

Five Profile Geometries In Stock

Triangular, lemon, star, rectangular, and hexagonal — we stock all five standard PTO tube profiles to ensure direct-fit compatibility with virtually every agricultural PTO shaft assembly used in Australia, regardless of origin.

🔨

Direct OEM Cross-Compatibility

Our PTO shaft tubes are manufactured to the same dimensional standards as original-equipment tubes used in major brand drivelines. Cross-kit compatibility codes (e.g., 6.03, 6.04, 6.03ST, 6.04G) ensure you can match tubes to existing U-joints without modification.

🎯

Corrosion-Resistant Surface Treatment

Available with zinc plating, phosphate coating, or painted finish to resist the harsh Australian climate — from coastal salt air in Queensland to the dry, abrasive dust of Western Australian wheat belts. Surface treatments extend service life by 30–50% compared to untreated tubes.

Structure Design & Material Engineering

Material Selection

Our PTO shaft tubes are manufactured from medium-carbon steel (typically C45 / 1045 equivalent) or alloy steel (such as 20CrMo / 4130 equivalent) depending on the series and intended torque rating. Medium-carbon grades provide an excellent balance of strength, hardness, and machinability for standard-duty applications. Alloy steel grades are specified for heavy-duty series where superior fatigue resistance and higher yield strength are essential.

Wall thickness varies by series and profile type, ranging from approximately 2.5 mm for Series 1 triangular tubes up to 5.5 mm or more for Series 10 star-profile tubes. Uniform wall thickness is critical to prevent unbalanced loads during high-speed rotation.

Manufacturing Process

The cold-drawing process involves pulling a heated steel preform through a series of precision-machined dies to progressively form the desired cross-sectional profile. This process work-hardens the steel, increasing its yield strength by 15–25% compared to hot-rolled stock, while simultaneously producing the smooth surface finish that is critical for low-friction telescoping. After drawing, tubes undergo stress-relief annealing, straightening, and finally surface treatment (zinc plating, phosphate, or paint) before quality inspection.

PTO shaft tube cold-drawn manufacturing process and material cross-section detail

Key Material Properties

Tensile Strength: 580–750 MPa (C45 grade)

Yield Strength: 340–450 MPa (after cold drawing)

Hardness: 180–240 HB

Surface Finish: Ra less than 1.6 um (cold drawn)

Elongation: 12–16% minimum

Typical Application Scenarios for PTO Shaft Tubes

PTO shaft tubes are central to virtually every tractor-driven implement in Australian agriculture. The choice of tube profile and series depends on the implement’s power requirement, operating speed, and dynamic loading conditions.

balers application

Hay Balers (Round & Square)

Round and square balers demand continuous high-torque PTO delivery — typically Series 6 to 10 with star profile tubes. The PTO tube must handle peak loading during bale compression cycles while accommodating three-point hitch travel. Star tubes are preferred for large square balers due to their superior torque distribution under shock loads.

Flail Mower Gearbox application

Rotary Slashers & Mowers

Slashers and rotary mowers run at 540 RPM with moderate torque requirements. Triangular or lemon tubes in Series 4–6 are the standard choice. The smooth telescoping action of lemon-profile tubes is particularly beneficial for mowers operating on undulating terrain where hitch height changes frequently.

feed mixer application

Feed Mixers & TMR Wagons

Vertical and horizontal feed mixers subject PTO drivelines to extremely high start-up torque when mixing dense material. Series 8–10 star tubes handle the shock loads and provide long service life. Hexagonal tubes rated at 80HP or 90HP are also used on larger TMR mixer wagons.

grain transportation gearbox application

Grain Augers & Conveyors

Grain augers require steady, moderate-speed PTO power delivery. Triangular or lemon Series 3–5 tubes are the most common. The telescoping function allows easy coupling as the auger is positioned at different silo or bin heights. Rectangular tubes are also found on older European-origin auger assemblies.

post hole digger application

Post-Hole Diggers & Fencing Equipment

Post-hole diggers encounter sudden high-torque spikes when the auger hits rock or hard clay. Series 4–6 star or lemon tubes provide the necessary torque reserve and fatigue resistance. The telescoping range must be sufficient to accommodate the digger’s full stroke without bottoming out.

fertilizer spreader gearbox application

Fertiliser Spreaders & Seeders

Spreaders and air-seeder fan drives typically use Series 2–4 triangular or lemon PTO tubes. These light-to-medium-duty applications benefit from the self-centring action of lemon profiles, which reduce vibration and noise at higher operating speeds.

PTO Shaft Tube Selection Guide

Selecting the correct PTO shaft tube requires confirming several parameters. Using the wrong series, profile, or dimension can result in premature wear, excessive vibration, or catastrophic driveline failure. Follow this checklist to ensure correct selection:

Step 1: Identify the Series

Measure the existing cross and bearing kit (U-joint) diameter. Match it to the series in our specification tables above. Example: a cross kit measuring 92 mm x 30.2 mm corresponds to Series 6.

Step 2: Determine Profile Type

Examine the existing tube’s cross-section: count the lobes or flats. Three lobes = triangular; two-lobed oval = lemon; multi-point star = star profile; four-sided = rectangular; six-sided = hexagonal.

Step 3: Outer or Inner Tube?

Determine whether you need the outer (female) tube, the inner (male) tube, or both. The outer tube code typically ends in .03 (e.g., 6.03, 6.03ST) while the inner tube code ends in .04 (e.g., 6.04, 6.04G).

Step 4: Measure Tube Length

Measure the overall collapsed length and the maximum extended length of the existing driveline. Our tubes are supplied in standard lengths and can be cut to size. Ensure a minimum overlap of 1/3 the tube length when fully extended for safe operation.

Step 5: Check Power Requirement

Confirm the implement’s rated PTO power (in HP or kW) and operating speed (540 or 1000 RPM). Higher power and lower speed = higher torque. Select a tube series with sufficient torque capacity plus a safety margin of at least 20%.

Step 6: Installation Environment

Consider exposure to corrosive environments (salt spray, chemical fertilisers), extreme dust, or high humidity. Specify zinc plating or phosphate coating for harsh environments. Confirm that the safety shield is compatible with the tube profile.

Brand Cross-Compatibility & Replacement Guide

Note: Brand names mentioned below are used solely for cross-reference and selection convenience. They are registered trademarks of their respective owners. GBC is not affiliated with, endorsed by, or authorised by these brands. All references serve the purpose of helping customers identify the correct replacement part.

Our PTO shaft tubes are manufactured to the same international dimensional standards (ISO 500 series, ASAE S203.13) as original-equipment tubes found in drivelines from the following manufacturers. This means our tubes serve as direct drop-in replacement of the following OEM brands:

OEM Brand (replacement of) Applicable Profiles Common Series
Replacement of Walterscheid All five profiles Series 1–10, 36, 38, 42, 48, 50
Replacement of Bondioli & Pavesi All five profiles Series 1–10, 32, 36, 38, 42, 48, 50
Replacement of Comer Industries Triangular, Lemon, Star Series 4–10
Replacement of Benzi & Di Terlizzi Triangular, Lemon, Star Series 1–8
Replacement of Bareco (AUS) Triangular, Lemon, Star Series 1–10
Replacement of Eurocardan All five profiles Series 1–10, 42, 50
Replacement of Shengeng / Chinese OEM All five profiles Series 1–10

If your existing PTO shaft tube brand is not listed above, contact our technical team with the old tube’s cross-section measurements and cross kit dimensions — we will identify the correct replacement.

Quality Certification & Service Commitment

ISO 9001:2015 Certified

Our manufacturing facilities operate under ISO 9001:2015 quality management systems, ensuring consistent product quality from raw material intake through to final dispatch.

CE Marked

PTO shaft assemblies incorporating our tubes comply with CE Machinery Directive requirements for safety guard integration and driveline protection.

ISO 500 Dimensional Compliance

All tube profiles conform to ISO 500 (Agricultural tractors — PTO) dimensional standards, ensuring interchangeability with OEM drivelines worldwide.

📦

Australia-Wide Delivery

We ship to all Australian states and territories. Most standard-series tubes are in stock and dispatched within 1–3 business days from our Melbourne warehouse.

Frequently Asked Questions — PTO Shaft Tubes

What is the difference between a PTO shaft tube and a PTO shaft?+
A PTO shaft is the complete assembly including two telescoping tubes, two universal joints (cross and bearing kits), yokes, and a safety shield. The PTO shaft tube refers specifically to the profiled steel sleeve — either the outer tube or the inner tube — that forms the telescoping body of the shaft. Tubes are the most commonly replaced component in a PTO driveline because they wear at the contact surfaces over time.
How do I measure a PTO shaft tube to find the correct replacement?+
First, identify the cross-section profile (triangular, lemon, star, rectangular, hexagonal). Then measure the U-joint/cross kit outside diameter and bearing cap diameter — these two measurements determine the series. Next, measure the tube’s external width (across flats or across lobes) and compare to our specification tables. Finally, record the tube length. If in doubt, send photos and measurements to sales@australia-drive.com and our engineers will identify the part number.
Can I mix different profile types (e.g., triangular outer with lemon inner)?+
No. The outer and inner tubes must always have the same profile type. Mixing profiles will prevent proper engagement and cause the driveline to slip or seize. Always replace both tubes with matching profiles if you are changing from one type to another. The only exception is upgrading within the same series — for example, moving from triangular to star profile — but this requires replacing both tubes and may require different yokes.
How often should PTO shaft tubes be greased?+
We recommend greasing the telescoping section every 8–10 operating hours or at least once per week during the season. Use a quality lithium-based EP grease. Apply grease through the grease nipple on the outer tube (if fitted) or disassemble the tubes, clean off old grease and debris, apply fresh grease to the inner tube surfaces, and reassemble. Neglecting lubrication is the number-one cause of premature tube wear and seizure.
What causes PTO shaft tube wear and how can I extend tube life?+
The primary wear mechanisms are abrasive wear (dust and dirt ingress), adhesive wear (metal-to-metal contact from insufficient lubrication), and fatigue cracking (from repeated high-torque cycling). To maximise tube life: maintain the safety shield to keep dirt out; grease regularly; ensure correct alignment (U-joint operating angles within specification); avoid operating with the tubes fully extended or fully compressed; and replace worn tubes before excessive radial play develops, as increased play accelerates wear exponentially.
Do you supply PTO shaft tubes cut to custom lengths?+
Yes. We supply standard-length tubes that can be cut and finished to your required dimension. For bulk orders, we can produce tubes to custom lengths at our factory. Contact us at sales@australia-drive.com with the required profile, series, and length, and we will provide a quotation including any custom machining.
Can your PTO shaft tubes be used with 1000 RPM PTO applications?+
Yes. Our tubes are compatible with both 540 RPM and 1000 RPM PTO systems. The tube profile and series selection is determined by the cross kit dimensions and torque requirements, not by PTO speed alone. However, at 1000 RPM the driveline operates at nearly double the angular velocity, so dynamic balancing and tube straightness become even more critical. We recommend star profiles for 1000 RPM applications due to their more uniform load distribution at higher speeds.

Engineer’s Field Notes — Australian Application Case Studies

Sydney Region — Hawkesbury Valley Turf Farm, Series 6 Star Tube Upgrade

A commercial turf operation west of Sydney was experiencing recurring PTO driveline vibration on their gang-mower setup. On-site inspection revealed the original Series 6 triangular tubes had developed 2.5 mm of radial play after approximately 1,800 hours. We replaced both outer and inner tubes with Series 6 star-profile tubes (6.03ST outer, 6.04ST inner), which increased the contact surface area by approximately 40% compared to the triangular profile. Post-installation vibration readings dropped from 4.2 mm/s to 1.1 mm/s RMS. The farm manager reported noticeably smoother operation and estimated the upgrade would add at least two additional seasons before the next tube replacement.

Location: Hawkesbury, NSW — Implement: 3.6 m gang mower — PTO Speed: 540 RPM

Melbourne Region — Western District Dairy, Series 8 Star Tube for Feed Mixer

A 600-cow dairy operation in Victoria’s Western District contacted us after their TMR mixer’s PTO tube seized during a critical feeding window. The original lemon-profile Series 8 tube had not been greased adequately and had galled on the inner surface. We supplied a matched pair of Series 8 star tubes (8.03ST / 8.04ST) as an upgrade. Star profiles are more tolerant of marginal lubrication conditions due to their multiple load-sharing lobes. The dairy has now run 14 months on the new tubes without issue. We also supplied a recommended greasing schedule — every 8 hours during the mixing season — to prevent recurrence.

Location: Colac, VIC — Implement: Vertical TMR mixer, 22 m3 — PTO Speed: 1000 RPM

Brisbane Region — Darling Downs Grain Grower, Series 5 Triangular Tube for Auger

A broadacre grain operation on Queensland’s Darling Downs needed rapid replacement of a damaged Series 5 triangular PTO tube on their 10-metre grain auger during harvest. The outer tube had been dented by a falling steel bracket during transport. We dispatched a replacement 5.03 outer tube from our Melbourne warehouse, which arrived in Brisbane within 48 hours. The grower was able to complete sorghum harvest on schedule. Post-harvest feedback confirmed the new tube telescoped more smoothly than the five-year-old original — a testament to the improved surface finish of our current production run.

Location: Toowoomba, QLD — Implement: 10 m grain auger — PTO Speed: 540 RPM

Adelaide Region — Barossa Valley Vineyard, Series 4 Lemon Tube for Mulcher

A premium vineyard in South Australia’s Barossa Valley operates a compact under-vine mulcher on a narrow-track tractor. The tight turning radius places extreme angular demands on the PTO driveline. The original rectangular-profile tube had been wearing unevenly due to the high operating angles. We recommended upgrading to a Series 4 lemon-profile tube set (4.03L / 4.04L), which offers superior self-centring and more uniform contact pressure under angular misalignment. The vineyard manager reported a marked reduction in driveline noise and confirmed the new tubes had eliminated the intermittent “clunking” that occurred during headland turns.

Location: Barossa Valley, SA — Implement: Under-vine mulcher — PTO Speed: 540 RPM

Perth Region — Wheatbelt Broadacre, Series 42 Star Tube for Large Square Baler

A large-scale cropping and hay operation in Western Australia’s Wheatbelt region required a heavy-duty PTO tube replacement for their large square baler. The baler demands peak torque exceeding 2,500 Nm during the plunger compression stroke. We supplied Series 42 star tubes (10.03ST / 10.04ST equivalent heavy-duty configuration) with multi-lobe engagement. The star profile’s generous contact area provides excellent load sharing for this application. After a full 2024/2025 baling season — approximately 8,000 bales — the customer reported zero driveline issues and negligible wear on the star lobe flanks. This operation has since converted all four of their baler PTO drivelines to our star tubes.

Location: Northam, WA — Implement: Large square baler — PTO Speed: 1000 RPM

Customer Reviews

★★★★★

David M. — Hay Contractor, Gippsland VIC

Purchased: Series 6 Star PTO Tubes (pair) for round baler

“Fitted these to our baler at the start of the season and they’ve been flawless. Telescoping is noticeably smoother than the old tubes and the star profile feels much more solid under load. Great value for the price.”

★★★★★

Sarah T. — Farm Manager, Dubbo NSW

Purchased: Series 5 Triangular PTO Tubes for slasher & post-hole digger

“Ordered two sets — one for the slasher and one for the post-hole digger. Delivery to Dubbo was quicker than expected. Fit was exact, no modification needed. Our mechanic was impressed with the surface finish quality.”

★★★★★

Mark L. — Purchasing Manager, Ag Dealer, Adelaide SA

Purchased: Mixed pallet — Series 4, 6, 8 tubes (Triangular, Lemon, Star)

“We stock GBC PTO tubes as aftermarket options for our customers. The quality is on par with European-made originals at a significantly better price point. Cross-compatibility has been spot-on for every application we’ve tested. Reordering is straightforward.”

★★★★☆

James W. — Broadacre Farmer, Emerald QLD

Purchased: Series 8 Star PTO Tube (inner) for forage harvester

“The star tube is excellent quality — fits perfectly and handles the heavy loads without any sign of wear after a full season. Only reason for 4 stars instead of 5 is that I wish the zinc coating was a bit heavier for our humid conditions up here. Otherwise, great product.”

Related Products & Agricultural Driveline Accessories

PTO shaft tubes are one component of a complete agricultural power transmission system. GBC also manufactures and supplies the following complementary products designed to work alongside your PTO driveline:

agricultural gearbox

Agricultural Gearboxes

Right-angle, in-line, and speed-increasing gearboxes for hay mowers, rotary cutters, tillers, and spreaders. Designed to bolt directly to PTO-driven implements and pair seamlessly with our PTO shaft assemblies.

related pto shaft parts

Complete PTO Shaft Assemblies

Full PTO driveline assemblies including tubes, yokes, cross & bearing kits, and safety shields. Available in all standard series and profile types, ready for direct installation.

We also supply agricultural sprockets, gears, chains, and pulleys for complete driveline solutions. Whether you need a single replacement PTO tube or a full transmission overhaul for an entire fleet of implements, GBC is your one-stop source for agricultural power transmission components in Australia.

Victoria Extreme Operating Conditions Field Study

Victoria’s agricultural zones span from the irrigated dairy pastures of Gippsland to the dry-farmed cropping country of the Wimmera and Mallee. PTO shaft tubes used in Victoria must withstand wide temperature swings (from below 0 degC in winter mornings to over 40 degC in January), highly abrasive basalt-derived soils, and the corrosive effects of silage acids and fertiliser residues.

Our field testing programme across 18 Victorian properties over the 2023–2025 period confirmed that zinc-plated star tubes showed less than 0.3 mm of profile wear after 2,000 operating hours in these conditions. Triangular tubes in the same environment showed 0.5–0.8 mm of wear — still within acceptable limits but reinforcing the advantage of multi-lobe profiles for high-dust environments.

Queensland Varied Terrain Adaptation Guide

Queensland’s agricultural landscape ranges from the flat black-soil plains of the Darling Downs to the undulating cane-growing country of the Wet Tropics and the expansive cattle stations of the western interior. Each terrain presents distinct challenges for PTO drivelines.

On the Darling Downs, fine-particle cracking clay soils generate significant airborne dust that infiltrates telescoping tube joints. We recommend regular greasing intervals of no more than 6 hours during peak harvest for this region. In the Wet Tropics, high humidity and salt-laden coastal air accelerate surface corrosion — zinc-plated or phosphate-coated tubes are essential. For the western cattle stations where service intervals are longer due to remoteness, we recommend overspecifying the tube series by one step (e.g., Series 6 instead of Series 5) to provide additional wear margin.

New South Wales Local Industry Application Cases

New South Wales accounts for a significant share of Australia’s agricultural output — from the cotton and grain operations of the northern tablelands and western plains to the intensive horticulture of the Riverina and Hunter Valley. PTO shaft tubes in NSW see an exceptionally wide range of applications.

Cotton-farming clients in the Moree district use Series 7 and 8 star tubes on their module builders and boll buggies, where the cyclic loading pattern demands high fatigue resistance. Riverina rice growers use Series 4 lemon tubes on their levee-bank mowers, where the self-centring lemon profile accommodates the constant hitch-height changes as the mower follows the contour of the rice levee banks. Hunter Valley wine-grape growers specify Series 3 triangular tubes for their compact under-vine trimmers, valuing the light weight and smooth telescoping action for precision vineyard work.

Ready to Order PTO Shaft Tubes? Contact GBC Today.

General Bearing Company Pty Ltd (EVER-POWER Group Australia Agency) operates dedicated PTO shaft and tube manufacturing lines with annual production capacity exceeding 200,000 pieces. Our product range covers complete PTO shaft assemblies, individual replacement tubes in all five profiles, cross and bearing kits, yokes, safety shields, and complementary power transmission components including agricultural gearboxes, chains, sprockets, pulleys, and gears.

We do not only supply standard PTO shaft tubes. Our engineering team welcomes custom orders — non-standard profiles, special lengths, modified wall thicknesses, alternative materials, and bespoke surface treatments. Send us your drawings, samples, or specifications, and we will develop a custom solution tailored to your exact requirements.

Email: sales@australia-drive.com

PTO shaft tubes are the structural backbone of every power take-off driveline, transmitting rotational energy from the tractor PTO output to the driven implement. Available in five distinct profile geometries — triangular, lemon, star, rectangular, and hexagonal — these cold-drawn steel tubes ensure precise torque transfer, axial telescoping, and reliable protection of the inner universal joint shaft across Series 1 through Series 50 applications. Engineered for Australian broadacre, dairy, horticultural, and mixed-farming operations, our PTO shaft tubes deliver direct-fit compatibility with leading OEM drivelines while meeting ISO 500 dimensional standards.

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