Shaft Retention Collar



Dimension Chart
Shaft Retention Collar Size Chart
 Part Number Shaft Diameter Outside Diameter Collar Width
07-SRC-034 3/4" 1-1/2" 1/2"
07-SRC-100 1" 1-3/4" 1/2"
07-SRC-118 1-1/8" 1-7/8" 1/2"
07-SRC-114 1-1/4" 2-1/16" 1/2"
07-SRC-138 1-3/8" 2-1/4" 9/16"
07-SRC-112 1-1/2" 2-3/8" 9/16"
07-SRC-134 1-3/4" 2-3/4" 11/16"
07-SRC-200 2" 3" 11/16"
07-SRC-214 2-1/4" 3-1/4" 3/4"
07-SRC-212 2-1/2" 3-3/4" 3/4"
07-SRC-300 3" 4-1/4" 7/8"
 Part Number Shaft Diameter Outside Diameter Collar Width
07-SRC-25M 25mm 45mm 15mm
07-SRC-30M 30mm 54mm 15mm
07-SRC-35M 35mm 57mm 15mm
07-SRC-40M 40mm 60mm 15mm
07-SRC-45M 45mm 73mm 19mm
07-SRC-50M 50mm 78mm 19mm
07-SRC-55M 55mm 82mm 19mm
07-SRC-60M 60mm 88mm 19mm
07-SRC-65M 65mm 93mm 19mm
07-SRC-70M 70mm 98mm 19mm
07-SRC-75M 75mm 103mm 19mm
07-SRC-80M 80mm 108mm 19mm

We have all heard horror stories of boats sinking when a coupling breaks and the shaft is ripped out of the boat. PYI has a simple solution to assist in keeping the shaft in the boat.

The PYI Shaft Retention Collar is designed to help retain the Propeller or Rudder shaft in your vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling. The double split design provides the maximum in axial holding power with the benefit of quick and efficient assembly with the shaft installed.

Design fully engages the shaft without marring. Easily installed where major disassembly would otherwise be required. Greater axial holding power than set screw or one-piece clamping collars. Effective on hard and soft shafts.

Very simple to retrofit to existing prop shafts and rudder shafts. A cost effective and quick solution that could save thousands.


- Designed to protect Propeller and Rudder shafts

- Assists in keeping the shaft and rudder in the boat in the event of a coupling failure

- Easy installation with the shaft or rudder in place

- Available in sizes to fit shafts from 3/4” to 3” or 25mm to 80mm

- Simple design

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