In this section, find how to measure the universal joint and the tube to ensure proper replacement of your parts

Steps for measurement

Follow these simple steps and get all the information about your PTO type

Inner and Outer Tube

Measuring the Universal Joint

1. Take apart the universal joint

Disassemble the universal joint for measuring properly. Click the link below for a handy reference for replacing your U joint. PDF document from Weasler®.

2. Measure the U Joint

When you measure your universal joint, measure the length from one outer end to the other (D). You will also need to record the width of one end of the universal joint (C). Use these numbers to find the right size of a universal joint.

On the Bondioli & Pavesi type like this one, the snap ring should be of type B. If not, please review your choice of PTO shaft profile. ALL European PTO shaft drivelines are Type B snap ring.

3. Discover your PTO Shaft Series and Related Information

Click on the correct bearing diameter (C) and find all the information on your PTO model as well as the web link to the cross bearing and related parts



Series: S2 Series

Bearing Diameter (C): 23.8mm

Cap-to-cap Overall Length (D): 61.3mm

Snap Ring Type: B

Rated HP @ 540 RPM: 20

Rated HP @ 1000 RPM: 31

PART#: 1-0221

27mm (Check dimension D)


Series: S4 Series

Bearing Diameter (C): 27mm

Cap-to-cap Overall Length (D): 74.6mm

Snap Ring Type: B

Rated HP @ 540 RPM: 33

Rated HP @ 1000 RPM: 55

PART#: 1-0421

30.2mm (Check dimension D)


Series: S6 Series

Bearing Diameter (C): 30.2mm

Cap-to-cap Overall Length (D): 79.4mm

Snap Ring Type: B

Rated HP @ 540 RPM: 47

Rated HP @ 1000 RPM: 74

PART#: 2-0521

Measuring the Inner and Outer tube

The Bondioli & Pavesi triangular PTO INNER tube, is almost triangular. Only one corner is flat. The outer tube is wider and allows the inner tube to turn freely about 1/6 of a turn. The inside of the yoke has also the same shape as the corresponding tube.

Look for the flat corner on the INNER tube. Remember that only one of the three is squared. This flat is the top. Then, measure from the top to the lowest part of the tube. You now have the height.

For the next step, it is simpler but above all more precise to use a vernier. This tool will give you the exact thickness of the tube.

You can take the measurement anywhere on the tube, the thickness is the same.

For this triangular model, the outer shaft tubing should be on the tractor side. The inner tube on the implement.

With these measures in hand, you can determine your needs in terms of tubing but also the category if you lost the universal joint.

Cut your PTO shaft

Learn how to cut your PTO shaft to avoid damage to your tractor or implement but also serious injury. It's very simple, you'll see!

Complete PTO Shafts List

Shear Bolt 8mmx45mm

Shear bolt for Bondioli & Pavesi size 4-6. 100 series.
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