Joined: May 2018 Posts: 2,104 Threads: 110
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Location: Llandrindod Wells
Car type: 29 Special, 30 RK, 28 C Cab
Hi All
On another thread there is mention of the cotter pin that holds the kingpin tight in the axle eye. It is contrasted to the cotter pin that ‘say’ secures the crank on a bicycle.
Is there a correct definition for the two types? Half moon and wedge have been used. Austin refers to both as cotters. A Google search provides no answers.
Cheers
Howard
Joined: Mar 2015 Posts: 5,442 Threads: 231
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Location: Scotchland
Half moon and wedge is correct.
Other names will exist.
Joined: Nov 2017 Posts: 223 Threads: 18
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Location: Kennet Valley
Car type: 1932/3 AH tourer
Is not a 'split pin' also technically called a 'cotter pin?'
True satisfaction is the delayed fulfilment of ancient wish
Joined: Sep 2024 Posts: 24 Threads: 3
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Location: England
Car type: 1934 Austin Seven box saloon
I think 'cotter' can refer to a variety of locking devices. I work on rail wagons and we have cotters that are a roughly 4 x 2" rectangular plate passed through a slot. Bit off subject but there you are
Joined: Jan 2019 Posts: 1,565 Threads: 20
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Location: Bala North Wales
Car type: 1933 RP Standard Saloon
My dictionary defines a cotter as a pin or wedge passing through a hole to bind parts tightly together. That definition appears to cover a multitude of fixing devices.
It appears, however, that the Americans use the term to mean a split pin. I am reminded of the 'bon mot' attributed to the late Sir Winston Churchill describing the English and Americans as " two nations divided by a common language"
Joined: Aug 2017 Posts: 116 Threads: 6
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I've always called the brake pin type "taper cotters"
