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Thread: Tap sharpening attachment
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18th January 2020, 03:10 PM #1Most Valued Member
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Tap sharpening attachment
SAM_0580.jpgSAM_0579.jpgSAM_0578.jpgThe old goat is back with more pics.
This an old tap grinding attachment. The first pic has the pivot to set lead angle, the base is long lost but a piece of plate will do for that.
Pic 2 shows the cam inside of the handle, there are a set of cams from 3 flute to 6 flute. As the handle is turned the cam causes a lever to to rotate the aux or smaller shaft. This pivots the main casting to the base and provides radial clearance. The tap is held between centers with a smart opposing V block drive. The knurled knob on the main casting operates a travel limiting stop. For LH taps the cams are assembled reversed.
This tool is I think older than me and in excellent order.
BC
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- SAM_0579.jpg (176.3 KB)
- SAM_0578.jpg (142.7 KB)
- SAM_0580.jpg (191.6 KB)
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