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Spigot / recess sizing tool for Record Power standard jaws (50mm / 2") — image 1
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Spigot / recess sizing tool for Record Power standard jaws (50mm / 2")

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You want to turn a recess or a spigot to mount that workpiece on standard 50mm jaws? This sizing tool will help you!

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Model information

Category
Tools
License
Creative Commons — Attribution — Noncommercial

Sizing tool

When mounting bowl blanks on geared chucks you will need to decide if you want to mount the workpiece with a spigot or using a recess. With a spigot the chuckjaws will clamp from outside and hold fast to the spigot. With a recess the chuckjaws will expand and press into the recess to hold the workpiece.

For either way you need to take care of the right sizes for spigot or recess.

Function

This sizing tool will help you. You hold it over the turning workpiece. Center the center centric on the centerpoint. Every mark you make through one of the holes will work for spigot resp. recess.

I made this for the standard 50mm (2") jaws for my SC4 chuck from Record Power.

Print

1 or 2 colors, I used PLA, infill 15%, should be aligned correctly in the file. No mechanical load on this item to be expected. 

Be careful around rotating equipment.

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