Emco Compact 5 Modifications

[Colin CreedParticipant @colincreed93792]

Here’s that YouTube post I’d made mention of previously about the making of a “cut knurling tool”.

https://youtu.be/vj8pp3YJijg?si=JDKJVENAkE8kAHI1

[Graham MeekParticipant @grahammeek88282]

When using normal form knurling tools it is customary to be working at slow speeds. Some of the knurls above were produced at 300-500 RPM. The higher speed tends to get rid of the chips better. One Beauty of Jacques design is the simplicity in setting up. Admittedly it does take two passes when doing a diamond knurl, but given the results it is well worth the extra pass.

I have been having a go at putting John’s advice into practice when using the Helical knurling wheel to produce a straight knurl, and I must say it makes a difference. I have also rigged up a compressed air stream across the work and this gives a further improvement. When I get a chance I will take some photos of the results.

Regards

Gray,

[Graham MeekParticipant @grahammeek88282]

John has just completed the 3D view of my diminutive Cut Knurling tool.

This shows the construction details very well, especially the fine adjustment, (the small block held by two cap screws), to correct the helical spiral some knurls produce because they are not at the correct angle. Note also the spring loaded plunger to keep the index plate in place when turning the head from one position to another.

Regards

Gray,

[Colin CreedParticipant @colincreed93792]

Hi Graham,

 

Thanks for the update on this & to John for his 3D view.

I’m keen to know more about the pro’s & con’s to making this tool.

 

regards Colin

[Graham MeekParticipant @grahammeek88282]

Hi Colin,

The Cut knurling process is a lot kinder to the machine than the Forming process of more conventional Knurling techniques. The large pattern of the Diamond knurling shown above would be nigh on impossible to do on the C5, using the Forming process. Yet the C5 cut this knurl with no trouble at all using this tool.

Regards

Gray,

[Author]

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