Over Lock Nut Dimensions

[xciterwhiz]

Are the Bendix Model K front hubs 90mm ?
I'm looking for one for a prewar cycle truck.

Bendix Model hubs are not metric

 

[Schwinn Sales West]

I have seen 2 different Bendix model K hubs. One has the standard/normal threaded axle with thread on cones not sure if it has lock nuts. The ones I have on CT's kind of remind me of a full floating axle. They have a tube/pipe inside that the cones thread onto. The tube/pipe doesn't protrude through the cone so no lock nuts. The axle slides through it with no effect to the adjustment. I think this is the one referred to as the knock out axle, but unsure of its proper name.

Anyway, the floating one is 3.75"+- cone to cone or 95.25mm

That's correct, there's two different versions of the Model K hubs using the same hub shell. The "pipe" you talk about was called a quill, and it requires cones with a larger thread. The cones come in two different lengths. You bottom one out against a shoulder on the quill, and then adjust the other. The O.L.D. is the same on both style hubs. They also made a "wide version" of the hub for Sulkey's. Schwinn used the term Knock Out for their hubs with removeable, replaceable hub cups. The Bendix hubs were not knock out style.

John

 

[Schwinn Sales West]

Bendix Model hubs are not metric

Correct, they are 3/8 by 24.

John

 

[Schwinn Sales West]

Schwinn built the Twinn Tandem frames to the wider width "distance over lock nut" to accept the Bendix Automatic two speeds. You will see "an extra axle nut" used as a spacer nut under the left side of the wheel. This makes the normal coaster brakes the same width as the wider two speeds. You will also notice the coaster brake tandems used a special brake arm with an extra bend it to align with the frame brake strap. Just some hub width trivia.

John

 

[Rusty Klunker]

That's correct, there's two different versions of the Model K hubs using the same hub shell. The "pipe" you talk about was called a quill, and it requires cones with a larger thread. The cones come in two different lengths. You bottom one out against a shoulder on the quill, and then adjust the other. The O.L.D. is the same on both style hubs. They also made a "wide version" of the hub for Sulkey's. Schwinn used the term Knock Out for their hubs with removeable, replaceable hub cups. The Bendix hubs were not knock out style.

John

Not saying it is the proper name but, you will see "K" hubs listed for sale with "knock out axle".
This thread is a little older but I now have the third "K" hub. I had no idea what it was for, its about an inch wider.

 

[Rusty Klunker]

Schwinn built the Twinn Tandem frames to the wider width "distance over lock nut" to accept the Bendix Automatic two speeds. You will see "an extra axle nut" used as a spacer nut under the left side of the wheel. This makes the normal coaster brakes the same width as the wider two speeds. You will also notice the coaster brake tandems used a special brake arm with an extra bend it to align with the frame brake strap. Just some hub width trivia.

John

I've built a few of the hubs with the offset arm but never saw one on a Schwinn, just other brands.