SI...T/K Series — Female Thread Rod End Bearing Maintenance Free PTFE Lined

SI…T/K Series — Female Thread Rod End Bearing Maintenance Free PTFE Lined

SI-TK-SERIES — 16 bore sizes · d 5–50 mm · Internal female thread · PTFE composite liner · Zinc-plated rod body.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

SKU: SI-TK-SERIES Categories: , Tags: , , , ,
Inquiry Now

Rod End Bearings › Maintenance-Free / Female Thread

SI...T/K Series — Female Thread Rod End Bearing Maintenance Free PTFE Lined

16 bore sizes · d 5–50 mm · Internal female thread · PTFE composite liner · Zinc-plated rod body

Maintenance-Free16 Sizes 5–50mmFemale ThreadPTFE LinerZinc Plated

🆕 Series Overview

The SI...T/K series is a maintenance-free rod end bearing with an internal female thread on the rod body and a PTFE composite liner at the spherical sliding contact, eliminating the need for periodic re-lubrication. The rod body is zinc-plated for corrosion resistance.

Available in 16 bore sizes from 5 mm to 50 mm. Right-hand thread is standard; add suffix L for left-hand (e.g., SI 18T/K L). Add suffix S for stainless steel rod body. The T designation indicates zinc-plated body with PTFE composite liner.

SI TK rod end bearing product photo

⚙ Key Design Features

🔧

Maintenance-Free PTFE Liner

PTFE composite at spherical contact. No re-lubrication required for rated service life under normal operating conditions.

🔁

Female Internal Thread

Internal thread allows direct connection to male-threaded clevis pins, control rods, and actuator ends.

🔭

Zinc-Plated Rod Body

Zinc electroplating provides corrosion resistance for indoor and moderately humid environments.

✅

Left/Right Thread

Standard right-hand. Suffix L for left-hand thread in opposing-thread turnbuckle configurations.

📈

16 Bore Sizes

5 mm to 50 mm covering light linkage through heavy industrial applications.

🔎

Stainless Option

Suffix S provides stainless steel rod body for elevated corrosion resistance.

📋 Specification Table

ⓘ Thread d3 = rod body internal thread. dk = bearing bore. L3 = thread length. L4 = overall length. Dimensions mm, load ratings kN, weight grams.

Part No. d Thread B C1 W h1 d2 L4 dk L3 a° Dyn C kN Sta C0 kN Wt g
SI5T/K 5 M5x0.8 8 6 9 27 18 36 11.11 10 13 5.7 6.0 16
SI6T/K 6 M6x1.0 9 6.75 11 30 20 40 12.7 12 13 7.2 7.65 22
SI8T/K 8 M8x1.25 12 9 14 36 24 48 15.875 16 14 11.6 12.9 47
SI10T/K 10 M10x1.25 14 10.5 17 43 28 57 19.05 20 13 14.5 18.0 77
SI12T/K 12 M12x1.75 16 12 19 50 32 66 22.225 22 13 17.0 24.0 100
SI14T/K 14 M14x2.0 19 13.5 22 57 36 75 25.4 25 16 24.0 31.0 160
SI16T/K 16 M16x2.0 21 15 24 64 40 84 28.575 28 15 28.5 39.0 220
SI18T/K 18 M18x1.5 23 16.5 27 71 44 93 31.75 32 15 42.5 47.5 320
SI20T/K 20 M20x1.5 25 18 30 77 50 102 34.925 33 14 52.4 57.0 420
SI22T/K 22 M22x1.5 28 20 32 84 54 111 38.1 37 15 57.0 68.0 540
SI25T/K 25 M24x2.0 31 22 36 94 60 124 42.85 42 15 68.0 85.0 720
SI28T/K 28 M27x2.0 35 24 41 103 66 136 47.6 51 15 86.0 107.0 820
SI30T/K 30 M30x2.0 37 25 41 110 70 145 50.8 51 17 88.0 114.0 1100
SI35T/K 35 M36x2.0 43 28 50 125 80 167.5 57.1 56 16 101 206 1600
SI40T/K 40 M42x2.0 49 33 55 142 91 187.5 66.6 60 17 124 280 2400
SI50T/K 50 M48x2.0 60 45 65 160 117 218.5 82.5 65 12 308 485 5000
SI TK rod end bearing specification drawing

🔭 Materials & Construction

Rod body: carbon steel with zinc electroplating. Inner ring: 100Cr6 chrome steel, hardened. Outer race: steel with PTFE composite liner bonded to the inner spherical bore.

●

100Cr6 Inner Ring

Hardened chrome steel. Spherical OD ground and lapped for smooth contact with PTFE liner.

🔭

PTFE Composite Liner

Bonded to outer race. Friction coefficient 0.03–0.10 dry. Rated -50 to +200 degrees C.

🔎

Zinc-Plated Rod Body

Electroplated zinc on carbon steel for corrosion resistance.

🏭 Typical Applications

⚙

Control Linkages

Throttle, brake, and steering control rods in industrial machinery where maintenance-free operation reduces downtime.

📈

Agricultural Equipment

Implement lift linkages, draft control rods, and PTO engagement mechanisms in the field.

🔎

Pneumatic Cylinders

Rod-end connections on pneumatic actuators in automated equipment where re-lubrication access is impractical.

⚙

Industrial Automation

Robot arm links, pick-and-place mechanism pivots, and conveyor tensioning rods in sealed systems.

🔭

Valve Actuators

Valve stem connectors and damper control rods in HVAC, water treatment, and process piping systems.

📈

Test Equipment

Load application linkages on fatigue and endurance test frames where consistent friction is critical.

rod end bearings selection guide overview

🔧 Installation & Maintenance

🔎 Thread Engagement

Engage minimum 1.0 to 1.5 times nominal thread diameter. Use thread-locking compound under vibration.

🔧 Bore Fit

Inner ring bore uses h6 shaft tolerance for interference fit.

📈 Alignment

Minimise operating misalignment in neutral position. Do not exceed rated alpha angle.

⚙ No Lubrication

PTFE liner is the lubricant. Do not add grease to spherical contact.

🌡 Temperature

PTFE -50 to +200 C. Zinc rod body practical limit -30 to +120 C.

✅ End of Life

Replace when detectable play develops. Liner cannot be replenished.

❓ Frequently Asked Questions

▶ What does maintenance-free mean for this rod end bearing?

Maintenance-free means the PTFE composite or PTFE fabric liner provides dry-running lubrication at the spherical contact without requiring periodic grease re-lubrication. Under normal operating conditions the rated service life is achieved without adding lubricant. Protect the bearing from abrasive contamination and chemical attack on the PTFE liner, as these cannot be corrected by re-lubrication.

▶ Can this rod end be used for continuous rotation?

No. Rod end bearings with spherical plain bearing inserts are designed for oscillating and tilting motion. Continuous rotation generates heat at the spherical contact that exceeds the PTFE liner PV limit, causing rapid wear. For rotating applications, select a rod end with a rolling-element insert.

▶ How do I order left-hand thread?

Add suffix L to the part number for left-hand thread. For example, SI 18T/K L indicates left-hand internal thread. Right-hand thread is standard with no suffix required. Stainless steel variants add suffix S.

▶ What is the maximum misalignment angle?

The misalignment angle alpha (a) is listed in the specification table for each size. It is the maximum angular displacement between the bore axis and the housing axis. Do not exceed this angle in service — sustained overangle causes edge loading and shortens service life.

▶ What shaft and housing tolerances are recommended?

Inner ring bore: shaft tolerance h6 for interference fit, f7 for sliding fit. For rod body thread: use standard metric thread engagement of 1.0 to 1.5 times the nominal thread diameter minimum. Apply thread-locking compound where vibration loosening is a risk.

📞 Ready to Order?

MOQ is 100 units per model. Provide bore diameter, thread specification, load case, and operating environment. All catalogue data is for reference only.

SI-TK-SERIES — 16 bore sizes · d 5–50 mm · Internal female thread · PTFE composite liner · Zinc-plated rod body.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

Contact Us

Email

sales@australia-drive.com

stuart_hamill@generalbearing.com.au

Tel: +61 3 9070 7991

SKU: SI-TK-SERIES Categories: , Tags: , , , ,

Related products

quote form