"Here are the photos of parts I have made so far.
The chainring bolts were some quick replacements we made that use a 6 x 1.0mm button head cap screw instead of cutting screw threads to make an aluminum screw. I wanted something more durable for everyday use. The machine screw is steel and threads into the longer end of the assembly.
The other piece is a Hirsch Joint Protector/Bearing Puller Cap. It is used to give the screw on a gear puller a place to rest at the end of the half-spindle and protect the Hirsch Joint from damage.
The chainring pictured is a 34 tooth inner for an UltraTorque crank that was CNC milled from 6061-T6 plate. It is hard clear anodized. Hard anodizing only comes in clear and black but is very hard and slick. Clear turns out medium dark gray as pictured. This is a ring I rode this winter on the grit covered roads we have here in the high desert here in Utah. The wear was much less than what I would have expected to an OEM chainring. I couldn't see any wear between the teeth."
We particularly like the Hirsch joint protector. It's perhaps not something the average home tool kit will need, but any shop that's going to replacing Ultra Torque bearings on a regular basis should love this item.
Prices: Chainrings for $35-45, the Hirsch joint protector for $15. Check with Terry on prices for the chainring bolts.
Kerry Whittle
T2C Racing
West Jordan, UT
kk7jo@earthlink.net
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