Answering the top questions about square PTO shaft tubing, this guide highlights square and metric options suited for North American farm equipment. The best picks below target buyers who need reliable, easily sourced tubing or extensions for square drives. Ideal for owners replacing worn components, service technicians, and DIY farmers seeking straightforward compatibility and solid performance. A quick comparison table follows to help you pick at a glance.
| Product | Shape/Type | Best For |
|---|---|---|
| Weasler 59-1/16″ Lemond Shaped Outer Profile Tubing | Lemon Shaped Outer Profile | Metric drive lines when lemon profile is present |
| Weasler 6 Foot x 1″ Solid Square Shaft W Series | Square Shaft, W Series | Domestic square tubing setups |
| Outer Profile Metric PTO Tubing (Bondioli/Weasler) | Metric outer tubing | Metric drive lines, Bondioli/Weasler combinations |
| S.118284 CV PTO Shaft, 1 3/8-6 Spline 36MM Tube | 1 3/8″ diameter, 6-spline | OEM-style aftermarket fitment |
| New 10″ 6-Spline PTO Repair Shaft | 1-3/8″ dia, 6-spline | Short replacement for damaged shafts |
Weasler 59-1/16″ Lemmon Shaped Outer Profile Tubing 600-7130
This square/metric outer profile tubing is designed for Walterscheid 2100/100 Series drives and features a lemon-shaped outer profile. It is best for shops dealing with Walterscheid components and Series 2100/100 assemblies. Caution: verify cap size (22.0 mm) and overall length (54.8 mm cap-to-cap) to ensure a proper fit with your drive line.
Weasler 6 Foot x 1″ Solid Square Shaft W Series 400-0016
Best for buyers needing a straightforward, domestic square shaft, this W Series 400-0016 is simply the square shaft option. It helps determine North American versus metric systems by shape: square indicates domestic. This choice is better for standard, non-lemon drive lines where square foot fittings are confirmed. Limitation: it does not cover metric profiles or lemon-shaped tubing.
Outer Profile Metric PTO Tubing
Metric drive line components, this outer tubing suits Bondioli-series 8 drive shafts or Bondioli 6 & 7 outer tubing, supplied in 59″ lengths. It is best for metric systems and for users integrating Bondioli-style parts. Caution: ensure correct compatibility with your Bondioli or Walterscheid inner shafts and overall system length.
S.118284 CV PTO Shaft, 1 3/8-6 Spline 36MM Tube
This aftermarket part is designed to meet or exceed OEM specifications. It notes caution about verifying fit prior to ordering, and some listings may use stock images that differ from the actual product. Best for those seeking aftermarket equivalents with OEM alignment, and for users who require tight tolerance of a 1 3/8″ 6-spline configuration.
PTO Extender For Tractor 6 Spline 1-3/8″
Best for extending or shortening PTO drive lines without replacing shafts, this extender handles 1-3/8″ 6-spline connections suitable for tractors up to 70 HP. Choose this if you need quick-connect versatility and compatibility with quick hitch systems. Limitation: verify the actual tractor PTO dimensions to avoid improper engagement.
New 10″ 6-Spline PTO Repair Shaft
Best for quick repairs, this 10″ replacement PTO shaft features a 1-3/8″ diameter with a 6-spline end. It suits systems requiring a short, robust repair shaft. Limitation: length may not accommodate longer drive lines or unusual hitch configurations.
PTO Extension Shaft Repair Part – 10″ (254mm) Length
This 10″ 1-3/8″ dia, 6-spline extension is a heavy-duty repair part designed to restore driveline performance. It is suitable for diverse PTO systems that use 6-spline connections and 1-3/8″ shafts, offering a practical compatibility option. Limitation: ensure the replacement matches the spline count and bore precisely to avoid misalignment.
New PTO Yoke Series 5 Metric 1-3/8″ 6 Features a Push Pin Quick Disconnect
Best for metric quick-disconnect PTO systems, this universal 5-series yoke fits 1-3/8″ x 6-spline shafts. It features a push-pin quick disconnect for easy implement or tractor shaft attachment. Caution: verify bore diameter and cross width to ensure full engagement and compatibility with your PTO assembly.
Buying Guide
Key purchase considerations help buyers match square PTO shaft tubing to their needs:
- Drive system type: Domestic square shafts are typically for North American setups; lemon-shaped and bell profiles are common in metric systems. Identify your tractor’s PTO style before shopping.
- Diameter and spline: Most parts use 1-3/8″ diameter with 6-spline ends. Confirm spline count, bore size, and cross width to ensure a secure fit.
- Material and durability: Look for alloy steel (e.g., 40Cr) or OEM-grade components for higher wear resistance and longer service life.
- Length and fit: Replacement shafts and extenders come in fixed lengths (e.g., 10″, 59″, 59″ lengths). Ensure length matches your driveline geometry and connector spacing.
- OEM vs aftermarket: Aftermarket parts may meet OEM specs but verify fit and compatibility with your specific model and attachments.
- Installation notes: Some items require specific end fittings or housings (yokes, push pins). Confirm compatibility with your implements (brush cutters, rotary cutters, post hole diggers, etc.).
- Compatibility with brands: Walterscheid, Bondioli & Pavesi, and Weasler drive lines have distinct profiles. Mixing profiles can cause misalignment or failure.
FAQ
What is the difference between square and lemon-shaped PTO tubing?
Square tubing is typically North American (domestic), while lemon-shaped is a common metric profile used with Walterscheid and similar brands. Shape helps identify compatibility with certain drive lines.
How do I know which spline count I need?
Check your existing shaft ends or the implement’s PTO connection. Most common domestic shafts use 6-spline ends; verify your specific model for the correct count.
Can I mix OEM and aftermarket PTO parts?
Yes, if the parts meet the same specifications (diameter, spline, length, bore). Verify fit before installing to prevent driveline misalignment.
Is a shorter PTO repair shaft better than a full replacement?
Short repair shafts are cost-effective for localized damage. For extensive wear or mismatched components, replacing the entire shaft or outer tubing may be more reliable.
What should I inspect before purchasing a PTO extender?
Confirm the extender’s spline count, bore size, and compatibility with your tractor’s PTO system, plus whether your equipment requires quick-connect or threaded connections.
Are metric and square PTO parts interchangeable?
No. They use different profiles and mounting standards. Ensure the part matches your drive line’s profile and dimensions.
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