S and S Machine
Bicycle Torque Couplings (BTCs)
Your Travel Bike........Your Only Bike!

Mandrel for Machining S and S Coupling Lugs
(framebuilder tool)


Each mandrel includes a washer and 3 screws so can be used to machine both BTC and BTC2 Couplings.


Mandrel chucked and ready to turn the lug to fit the inside of a tube

 
Titanium (visible weld) BTC™ mounted on a mandrel for turning the lug diameter down to fit the ID of the tube

 
Stainless Steel BTC2 mounted on a mandrel for turning the lug diameter down to fit the ID of the tube

 

Size Price
BTC2
(Stainless)
BTC
(Ti and Cr-Moly)

1 mandrel, 1 washer and 3 screws
1 1/8" 1" $50
1 1/4" 1 1/8" $50
1 3/8" 1 1/4" $50
1 1/2" 1 3/8" $50
1 5/8" 1 1/2" $55
1 3/4" 1 5/8" $55
1 7/8" 1 3/4" $60
2" 17/8" $60
  
 
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