Monday, August 4, 2008

Benjamin 317 Rifle Disassembly, Part 3

So then I chucked a piece of 7/16" diameter tool steel (I have no idea the exact alloy...came from the scrap bin)...

Setting a threading tool on center.

Turning down the OD to 9/32"

First pass threading 32 tpi.

Halfway through.

I swung the compound over to 10 degrees and put a taper on the end of the tap.

Milling the flutes. They have zero rake.

All done.

Milling the flats for the tap wrench.

I hardened and tempered with my acetylene torch and it was done.

Tapping the puller end.

Threads look good.

And I threaded the end onto the valve to check.

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