Tappng and Knurling

ryan · Mar 21, 2003

We are tapping and knurling using 'The working shop' speeds and feeds.eg.16mm x 28mm deep tap in st.st. 2500+ parts to the tap and Knurling 20mm dia straight over 5000 parts and we regrind both after. SEE
http://www.bin95.com/machining-guide.htm

ryan · Apr 22, 2003

To regrind we simply surface grind to beyond the bad wear for 3mm then spacers take up
the removed part, we then re-lead
as not to have a sharp corner.Before we do this we turn the knurls around.On CNC's we can tilt the knurl holder by 1 to 2 degrees thus creating a clearance on the wheels.The example I gave is used on Index C29 cam auto
knurling from the turret,these we cannot tilt.Using a 3wheel set size holder we donot have to adjust the knurl only the pre knurled dia size.Using this method we raise a Dia by + 0.3/0.35 mm constanton a 1mm pitched wheel.

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Tappng and Knurling

ryan

Aluminum

ryan

Aluminum

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