ER32 Collet Chuck

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rherrell

rherrell

Member
Joined
Aug 22, 2006
Messages
6,334
Location
Pilot Mountain, NC
I bought a Tool and Cutter Grinder for several reasons but the main one was so I could make "Step Drills". I grind the "step" part to diameter on my metal lathe toolpost grinder but I needed an accurate way to grind the relief angles on the cutting edge.

The grinder came with a 5C collet chuck but a 5C is limited as to the diameters it will hold. On the other hand, I already had a full set of ER32 collets that would be perfect for what I needed.

Here are the two chucks side by side, the ER32 on the left and the 5C is on the right...

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Here are 3 views of the chuck I made...

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Here are two views of the 5C chuck that came with the grinder...

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Here are 2 views of the ER32 chuck...

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PatrickR

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Joined
Apr 8, 2017
Messages
1,432
Location
Rural America
Very nice. What are your plans for the step drills? Recently the idea of step drills for FP sections was talked about. Is that doable?
 
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