rpeterson53
Well-Known Member
- Joined
- Sep 23, 2019
- Threads
- 4
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- Location
- Richland, WA
- Vehicle(s)
- 2019 Ranger Lariat, 2019 Mazda MX-5 RF, 2016 Subaru Outback 3.6R
Hi Phil
I too have multiple sets of SAE and Metric tools in both 6 and 12 point. I even have spline sockets that often will work on SAE and Metric. Seems we needed them on certail aircraft I worked on early in my career. I started out in the aircraft world back in 1966 and we typically used 12 point SAE tooling. Heck, I even owned British Whitworth tooling for my Triumph motorcycle.
Here's a wrench you probably don't own in your collection. Its a "palnut" wrench. Radial engines often used nuts that were not self locking due to thermal issues as I recall. Cylinder hold down nuts were just a plain nut thread. A palnut is a thin stamped steel nut that threaded on top of the cylinder hold down nut as the locking mechanism, i.e. jam nut. The nuts were thin and it was very difficult to use a regular wrench to torque the palnut and the wrench would slip off and then grap the hold down nut. The palnut wrench as shown in the photograph has a feature that prevents the wrench from slipping down. The short length came in handy as the hold down nuts were in tight locations and often you installed and tightened the palnut by feel.
When I migrated into the engineering world supporting commercial jets, I kept these special wrenches. They came in multiple sizes to fit the palnut. I would show them to the AME's who had never worked on a radial engine and bet them they didn't know what the wrench was called or used for. Never lost a wager........
I realize this has nothing to do with the original posting. Reading your posting reply inspired me -
Cheers
Roy Peterson
Retired
I too have multiple sets of SAE and Metric tools in both 6 and 12 point. I even have spline sockets that often will work on SAE and Metric. Seems we needed them on certail aircraft I worked on early in my career. I started out in the aircraft world back in 1966 and we typically used 12 point SAE tooling. Heck, I even owned British Whitworth tooling for my Triumph motorcycle.
Here's a wrench you probably don't own in your collection. Its a "palnut" wrench. Radial engines often used nuts that were not self locking due to thermal issues as I recall. Cylinder hold down nuts were just a plain nut thread. A palnut is a thin stamped steel nut that threaded on top of the cylinder hold down nut as the locking mechanism, i.e. jam nut. The nuts were thin and it was very difficult to use a regular wrench to torque the palnut and the wrench would slip off and then grap the hold down nut. The palnut wrench as shown in the photograph has a feature that prevents the wrench from slipping down. The short length came in handy as the hold down nuts were in tight locations and often you installed and tightened the palnut by feel.
When I migrated into the engineering world supporting commercial jets, I kept these special wrenches. They came in multiple sizes to fit the palnut. I would show them to the AME's who had never worked on a radial engine and bet them they didn't know what the wrench was called or used for. Never lost a wager........
I realize this has nothing to do with the original posting. Reading your posting reply inspired me -
Cheers
Roy Peterson
Retired
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