Shaft Retention Collar


Part Number: 07-SRC-034

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.

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- 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

Customer Reviews

Based on 28 reviews
Jason Ellis-Bouchard

Shaft Retention Collar

Raymond Taylor
Good advice and quick service

What I said above

randal ebberson


Craig Miller
I just rebuilt me PSS seals.

My 6 year boot life has passed once again and so it was time to rebuild my PSS on both shafts. I have 1 1/4” shafts on a 32' twin diesel flybridge motor yacht. These seals are awesome. I contacted PYI at their factory since I live just south an hour or so. My wife and I met the owner Kevin Woody at the front desk. I had my old parts with me. He looked at my carbon/graphite flanges and told me they were the wrong internal bore size for my shafts. He said "wait a moment, I’m going to fix you up.” He provided me with two brand new SS rotors and flanges for no charge. These were the updated ones with the stainless cooling line barbs as my old ones had a plastic barbs. He also gave me 4 rebuild kits. These contain the new SS set screws, rotor o-rings, the little rubber end covers for the boot clamps, a hex wrench and a small tube of blue Loctite. I bought the remaining consumable rebuild part which is boots that come with their beautifully engineered billet clamps. I have to tell you, PYI is a standup company. Kevin gave my wife and I a personal tour of the plant, the CNC machine shop which is impressive, the quality assurance lab, and the shipping area. We also saw a new flange design which was running on a test bed. It had been running several hundred hours and was dry as a bone. The place is as clean as an operating room. We were shown how they use a device called a helium light band wavelength optical viewer to quality assure the lapped “flatness” of a graphite carbon flange to just a few “Heliums”. That is very near perfectly flat. We were amazed. Kevin Woody is a wonderful man who took his time, took us under his wing and backed his product long past any reasonable warranty period and was so generous as to not charge us for the parts we needed since he felt they were not initially correct. To say they stand behind their product is an understatement. If I were you, I would use the PYI packless shaft seal system on your boat. Who wants sea water in your engine bilge if it doesn’t have to be there? I sure don’t. Thanks Kevin for the fun time we had looking at your amazing factory. And a huge thanks for backing your product beyond all reasonable expectation. The quality of your product is first class. It was a pleasure to meet you and your crew. God Bless. Craig M.

Michael Brooks
Shaft Retention Collar

A well designed and well machined shaft collar. Easy installation.

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