Technical Specifications — PTO Adaptor Models
Below you will find the complete range of PTO adaptor part numbers, organised by the 00.18.02 and 00.18.07 series. Each adaptor is defined by its female (input) spline, male (output) spline, and overall length.
00.18.02 Series — PTO Adaptors
| Part Number | Spline (Female) | Spline (Male) | Length (mm) |
|---|---|---|---|
| 00.18.02B*A | 1 3/8″ Z6 | 1 1/8″ Z6 | 140 |
| 00.18.02B*B | 1 3/8″ Z6 | 160 | |
| 00.18.02B*D | 1 3/8″ Z21 | 160 | |
| 00.18.02B*G | 8-32×38×6 | 160 | |
| 00.18.02B*C | 1 3/4″ Z6 | 175 | |
| 00.18.02B*E | 1 3/8″ Z6 | 1 3/4″ Z20 | 175 |
| 00.18.02D*B | 1 3/8″ Z21 | 1 3/8″ Z6 | 160 |
| 00.18.02D*D | 1 3/8″ Z21 | 160 | |
| 00.18.02D*G | 8-32×38×6 | 160 | |
| 00.18.02D*C | 1 3/4″ Z6 | 175 | |
| 00.18.02D*E | 1 3/4″ Z20 | 175 | |
| 00.18.02C*B | 1 3/4″ Z6 | 1 3/8″ Z6 | 175 |
| 00.18.02C*D | 1 3/8″ Z21 | 175 | |
| 00.18.02C*G | 8-32×38×6 | 175 | |
| 00.18.02C*C | 1 3/4″ Z6 | 175 | |
| 00.18.02C*E | 1 3/4″ Z20 | 175 | |
| 00.18.02E*B | 1 3/4″ Z20 | 1 3/8″ Z6 | 175 |
| 00.18.02E*D | 1 3/8″ Z21 | 175 | |
| 00.18.02E*G | 8-32×38×6 | 175 | |
| 00.18.02E*C | 1 3/4″ Z6 | 175 | |
| 00.18.02E*E | 1 3/4″ Z20 | 175 | |
| 00.18.02G*B | 8-32×38×6 | 1 3/8″ Z6 | 160 |
| 00.18.02G*D | 1 3/8″ Z21 | 160 | |
| 00.18.02G*G | 8-32×38×6 | 160 | |
| 00.18.02G*C | 1 3/4″ Z6 | 175 | |
| 00.18.02G*E | 1 3/4″ Z20 | 175 |
00.18.07 Series — PTO Adaptors
| Part Number | Spline (Female) | Spline (Male) | Length (mm) |
|---|---|---|---|
| 00.18.07B*A | 1 3/8″ Z6 | 1 1/8″ Z6 | 140 |
| 00.18.07B*B | 1 3/8″ Z6 | 160 | |
| 00.18.07B*D | 1 3/8″ Z21 | 160 | |
| 00.18.07B*G | 8-32×38×6 | 160 | |
| 00.18.07B*C | 1 3/4″ Z6 | 175 | |
| 00.18.07B*E | 1 3/8″ Z6 | 1 3/4″ Z20 | 175 |
| 00.18.07D*B | 1 3/8″ Z21 | 1 3/8″ Z6 | 160 |
| 00.18.07D*D | 1 3/8″ Z21 | 160 | |
| 00.18.07D*G | 8-32×38×6 | 165 | |
| 00.18.07D*C | 1 3/4″ Z6 | 175 | |
| 00.18.07D*E | 1 3/4″ Z20 | 175 | |
| 00.18.07G*B | 8-32×38×6 | 1 3/8″ Z6 | 160 |
| 00.18.07G*D | 1 3/8″ Z21 | 165 | |
| 00.18.07G*G | 8-32×38×6 | 165 | |
| 00.18.07G*C | 1 3/4″ Z6 | 175 | |
| 00.18.07G*E | 1 3/4″ Z20 | 175 |
Standard Profile for Agricultural Splines
The diagrams below illustrate the internationally recognised involute spline profiles used across our PTO adaptor range. Understanding these profiles — from the 6-spline 1 1/8″ (Profile A) through to the metric 8-42×36×7 (Profile N) — is essential for accurate part selection.
Key Features & Benefits of Our PTO Adapters
⚙ Precision CNC Machining
Every adaptor is CNC-turned to tight tolerances, guaranteeing a snug spline fit with minimal backlash. This eliminates vibration and premature wear under sustained rotary loads.
💪 Heat-Treated Alloy Steel
Forged from 42CrMo or equivalent chromium-molybdenum alloy steel and through-hardened to 58–62 HRC on the spline surfaces, delivering exceptional fatigue resistance for demanding field conditions.
🔄 Extensive Spline Coverage
From 1 1/8″ Z6 to 1 3/4″ Z20 and metric 8-32×38×6, the catalogue covers virtually every female-to-male conversion encountered in modern farming — no obscure adaptor left behind.
✅ Drop-In Replacement
Designed as a direct substitute for OEM adaptors from leading European and North American manufacturers. No modifications to your existing PTO shaft or gearbox are required.
🛡️ Anti-Corrosion Finish
A phosphate or zinc-plated surface treatment shields each adaptor against rust and chemical exposure, extending service life even in humid coastal or irrigated environments.
📈 Cost-Effective Fleet Solution
Stocking a set of PTO adaptors is far cheaper than purchasing multiple dedicated PTO shafts. Ideal for dealers, hire companies, and mixed-brand farming operations.
Compatibility — Tractors, Implements & Industrial Equipment
Our PTO shaft adaptors conform to the ISO 500 and ASAE S203/S204 standards that govern agricultural PTO connections globally. This means they work with virtually any tractor or implement fitted with a standard splined PTO stub, including but not limited to:
| Category | Compatible Brands / Equipment |
|---|---|
| Tractors | John Deere, Case IH, New Holland, Kubota, Massey Ferguson, Fendt, Deutz-Fahr, CLAAS, Valtra, McCormick, Kioti, Mahindra |
| Mowers & Slashers | Finishing mowers, flail mowers, rotary cutters, slashers from Howard, Sitrex, AgriMaster, Del Morino |
| Tillage | Rotary hoes, cultivators, power harrows — Celli, Maschio, Kuhn, Falc |
| Hay & Forage | Round balers, square balers, tedders, rakes — Vicon, Krone, McHale, Lely |
| Pumps & Generators | PTO-driven water pumps, alternators, compressors for irrigation and on-farm power generation |
| Industrial | Wood chippers, post-hole diggers, cement mixers, grain augers, feed mixers |
Installation & Usage Guide
Step-by-Step Installation
- Identify spline profiles — Measure or visually confirm the female spline on your implement input shaft and the male spline on the tractor PTO stub. Count the number of teeth and measure the outside diameter.
- Select the correct adaptor — Cross-reference your female and male spline sizes against the part number tables above. Verify the overall length suits your coupling gap.
- Clean both shafts — Remove dirt, old grease, and rust from the PTO stub and the implement input shaft using a wire brush and solvent.
- Apply grease — Coat the adaptor’s female bore and male spline teeth with high-quality lithium-based EP grease (NLGI Grade 2).
- Slide the adaptor on — Insert the tractor’s PTO stub into the adaptor’s female end. Rotate slightly until the splines engage, then push fully home.
- Connect to the implement — Slide the implement’s yoke or input shaft over the adaptor’s male end. Ensure the locking pin or collar engages securely.
- Check for free rotation — Rotate the assembly by hand to confirm smooth, binding-free movement before starting the engine.
Safety Precautions
⚠️ Warning: Rotating PTO shafts are extremely dangerous. Observe all safety precautions at all times.
Always disengage the PTO and switch off the engine before installing or removing an adaptor. Ensure that PTO safety shields are in place before operation. Never wear loose clothing near a spinning PTO shaft. Keep bystanders and children at a safe distance. Re-grease the adaptor every 8–10 operating hours or at the start of each season.
Typical Application Scenarios
🌾 Broadacre Cropping
Farmers operating rotary hoes, seed drills, and grain augers often encounter spline mismatches when pairing implements from different manufacturers. A PTO adaptor lets you run a Kuhn power harrow behind a John Deere tractor without any shaft modification.
🌿 Viticulture & Horticulture
Vineyards and orchards rely on compact tractors (often Kubota or Kioti) paired with Italian or Spanish implements that use metric spline profiles. The adaptor converts metric 8-32×38×6 to standard 1 3/8″ Z6 for seamless power transfer to mulchers and sprayers.
🐄 Livestock & Dairy
PTO-driven feed mixers, silage wagons, and manure spreaders frequently require 1 3/4″ Z20 connections while the tractor outputs 1 3/8″ Z21. An adaptor bridges the difference, keeping feed schedules on track without expensive driveline swaps.
🏭 Construction & Civil Works
Post-hole diggers, trenchers, and PTO-powered generators used on rural construction sites benefit from quick spline conversion — especially when the same tractor must drive multiple attachments in a single workday.
PTO Adaptor Selection Guide
Choosing the right PTO adaptor is straightforward when you know four key parameters. Use the checklist below before placing your order:
| Parameter | How to Determine | Why It Matters |
|---|---|---|
| Female Spline Size | Count the teeth and measure the bore diameter on the implement’s input shaft or yoke. | Determines which adaptor female end fits your implement. |
| Male Spline Size | Count the teeth and measure the OD of the tractor’s PTO output stub. | Determines which adaptor male end fits your tractor. |
| Overall Length | Measure the gap between the tractor PTO stub end and the implement yoke entrance. | Too short and the splines won’t fully engage; too long and the shaft may bind at tight turn angles. |
| RPM & Torque | Check the tractor’s PTO speed (540 or 1000 RPM) and the implement’s power demand. | High-torque applications may require a larger spline profile for safe power transfer. |
Still unsure which adaptor suits your setup? Contact our technical team with your tractor model, implement model, and a photo of both splines — we will recommend the exact part number within 24 hours.
Quality Certification & Service Commitment
✅
ISO 9001:2015
Manufactured under a certified quality management system with full traceability from raw material to finished part.
🇧🇪
CE Marked
Compliant with EU Machinery Directive 2006/42/EC for safe integration into agricultural and industrial drivelines.
🔎
100% Inspection
Each adaptor undergoes dimensional inspection, hardness testing, and spline-fit verification before shipment.
📦
12-Month Warranty
All PTO adaptors carry a 12-month warranty against manufacturing defects. Replacement or refund — no questions asked.
Frequently Asked Questions
What is the difference between a PTO adaptor and a PTO extension?
A PTO adaptor converts one spline profile to another — for example, changing a 1 3/8″ Z6 female to a 1 3/4″ Z20 male. A PTO extension, on the other hand, keeps the same spline profile on both ends but adds length between the tractor and the implement. If your spline sizes already match but the connection is too short, you need an extension, not an adaptor.
Can I use a PTO adaptor at 1000 RPM?
Yes. Our adaptors are engineered for both 540 RPM and 1000 RPM applications. However, at 1000 RPM the torque transferred can be significant, so always ensure the spline size is rated for the horsepower involved. For high-power applications above 150 HP, we recommend the larger 1 3/4″ spline adaptors.
How do I know if my tractor uses a Z6 or Z21 spline?
Count the number of teeth (splines) on the PTO stub. A Z6 profile has 6 wide, evenly spaced teeth, while a Z21 profile has 21 narrower involute teeth. Both are commonly found on 1 3/8″ diameter stubs. Z6 is the traditional North American standard; Z21 (also designated as a 20-spline in some literature) is prevalent on European tractors. When in doubt, check the tractor’s operator manual or send us a photo.
Does using an adaptor reduce PTO shaft life?
Not when properly installed and lubricated. Our adaptors are machined to the same tolerances as OEM components, so the connection is just as strong as a direct spline coupling. Regularly greasing the adaptor’s splines and ensuring the locking mechanism is secure will maintain full driveline integrity over the long term.
What is the 8-32×38×6 spline profile?
This is a metric involute spline designation commonly found on European agricultural equipment. The notation breaks down as: 8 teeth, 32 mm minor diameter, 38 mm major diameter, and 6 mm module. It is widely used by Italian, German, and French implement manufacturers as an alternative to the imperial 1 3/4″ Z6 standard.
Can I order a custom adaptor with a non-standard spline?
Absolutely. We offer full OEM and custom manufacturing services. If your application requires a spline profile not listed in our standard catalogue — such as 8-42×48×8 female to 1 1/8″ Z6 male, or a non-standard overall length — please contact us with your drawings or specifications. Minimum order quantities apply for custom runs.
How often should I regrease a PTO adaptor?
We recommend applying a fresh coat of lithium EP grease every 8–10 operating hours, or before each use if the adaptor sits idle for extended periods. In dusty or wet conditions, more frequent greasing is advisable to prevent abrasive wear and corrosion inside the spline bore.
Customer Reviews
Average rating: ⭐⭐⭐⭐⭐ 4.8 / 5 (based on 5 verified reviews)
⭐⭐⭐⭐⭐ Mark T. — Toowoomba, QLD
Bought the 00.18.02B*D to connect my old Massey 1 3/8″ Z6 to a new Italian rotary hoe with Z21 input. Slid on perfectly, zero vibration after 40 hours of work. Saved me from buying a whole new driveline. Very happy with the machining quality.
⭐⭐⭐⭐⭐ Sarah L. — Griffith, ACT
We run a machinery hire business and keep a full set of these adaptors in stock. Customers return equipment in one piece, and we avoid having to supply ten different PTO shafts. The 00.18.07 series has been particularly popular — great build quality and the zinc plating holds up well.
⭐⭐⭐⭐⭐ James R. — Barossa Valley, SA
Our vineyard uses compact Kubota tractors with 1 3/8″ Z6 PTO paired with an Italian under-vine cultivator that requires 8-32×38×6. The adaptor made the conversion effortless. Solid steel construction and it hasn’t budged after an entire season of heavy use through wet clay soils.
⭐⭐⭐⭐ David K. — Shepparton, VIC
Reliable adaptor that does the job well. I dropped one star only because the packaging could be improved — arrived loose in the box. But the adaptor itself is well machined and fits true. Reordered three more for our other machines.
⭐⭐⭐⭐⭐ Tom H. — Albany, WA
Running a 1 3/4″ Z20 to 1 3/8″ Z21 adaptor on our baler for a second season now. No wear visible on the splines at all. Fast delivery to WA and the pricing was fair for the quality. Will definitely purchase again.
Related Products & Accessories
Complete your driveline solution with these complementary components. Each product is designed to work seamlessly alongside our PTO adaptors for a reliable, safe power transmission system.
❌
Cross Kits (Universal Joints)
Replacement U-joint cross and bearing kits in all popular sizes — ensuring smooth angular power transfer through the driveline.
🔧
Slip Yokes & Splined Shafts
Telescoping slip yokes with push-pin or ball-collar locking mechanisms, available in every standard spline profile.
🛠️
Complete PTO Shafts
Full-assembly PTO drive shafts with guards, from light-duty Series 1 through to heavy-duty Series 8 for maximum horsepower transfer.
🛡️
Safety Shields & Guards
CE-compliant plastic safety shields and bearing-mounted guard assemblies to protect operators from rotating driveline components.
Why Choose Us — Our Manufacturing Strength
We are a specialist driveline manufacturer with over 20 years of experience producing PTO shafts, adaptors, universal joints, and associated components for the global agricultural and industrial markets. Our factory operates a fully integrated production line — from raw steel bar cutting and CNC machining through to heat treatment, surface finishing, and final assembly — giving us complete control over quality at every stage.
We export to more than 30 countries across Australia, Europe, North America, South America, and Southeast Asia, serving both OEM customers and aftermarket distributors. Our engineering team can develop custom adaptors from your drawings or reverse-engineer existing parts to exact specifications.
With annual production capacity exceeding 500,000 units, we offer competitive lead times, flexible MOQ arrangements, and private-label packaging for dealer and brand partners. Every component that leaves our facility is backed by our ISO 9001-certified quality system and a commitment to customer satisfaction.
Partner With Us — Enquire Today
Looking for a reliable PTO adaptor supplier?
Whether you need a single adaptor for your farm or container-load quantities for distribution, we are ready to help. Get a personalised quote with competitive pricing, fast lead times, and dedicated after-sales support.
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