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Brampton track crank arms with Aluvac 46t chain ring sprocket

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dave429

I live for the CABE
Looking for info on this crankset. What years or era, rare or desirable? Any other info? Thanks!

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See my response in your other post. They are not special and were used on English and other 3 speed bikes. Roger
 
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what is the length?

for Brampton of this era one would expect 6 1/2"

what is the wedgebolt size?

for Brampton one would expect 3/8" / 9.5mm

a 9.0mm wedgebolt would suggest a continental origin

what is the chainwheel bolt thread?

are chainwheel teeth cut for 1/8" or for 3/32" chain?

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ALUVAC -

this is a frankish producer of cycle fittings which was active in the 1930's and 1940's. do not have start/stop dates for them.

in addition to chainwheels, pedals, tools, and number plates were offered. found one report that they did a derailleur in cooperation with Freres Huret; it was product nr. 3716.

ALUVAC alloy pedals on a REXA machine of the 1930's -

1121308


Number plate -

1121311


1121314


Tool -

1121316


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I have seen the Aluvac chainring used on track racer bikes. Is this something that would commonly be used.
 
46T is exactly the chainset used on lightweights with internal geared (Sturmey Archer, etc.) rear hubs, just as @juvela showed.
A track chainset is probably going to be 54-58T
 
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Here is another chainset wearing a five-pin ALUVAC chainwheel.

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46T is exactly the chainset used on lightweights with internal geared (Sturmey Archer, etc.) rear hubs, just as @juvela showed.
A track chainset is probably going to be 54-58T
Wow, I rode on the Encino velodrome for a few years and never used a front chainring that big. Most modern and vintage track bikes that I have and have seen have front chainrings smaller than 54T.
 
-----

what is the length?

for Brampton of this era one would expect 6 1/2"

what is the wedgebolt size?

for Brampton one would expect 3/8" / 9.5mm

a 9.0mm wedgebolt would suggest a continental origin

what is the chainwheel bolt thread?

are chainwheel teeth cut for 1/8" or for 3/32" chain?

---

ALUVAC -

this is a frankish producer of cycle fittings which was active in the 1930's and 1940's. do not have start/stop dates for them.

in addition to chainwheels, pedals, tools, and number plates were offered. found one report that they did a derailleur in cooperation with Freres Huret; it was product nr. 3716.

ALUVAC alloy pedals on a REXA machine of the 1930's -

View attachment 1121308

Number plate -

View attachment 1121311

View attachment 1121314

Tool -

View attachment 1121316

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Crank arms are 7.5” overall and there is a B stamped on the inside.

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D448D86C-EF03-4A9E-B29D-610EDEADCE75.jpeg
 
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