eccentric plastic work holding

[Janger]

I am making some vise speed handles and I wanted a simpler way to hold down the sheet stock to my fixture plate.

So I made one eccentric aluminium clamp thing and then decided to 3d print the rest. There is a lip to prevent lifting up of the stock on the fixture plate. You turn it until the base contacts the stock - then lock down the bolt. I wonder if it will work?

 

[DavidR8]

Are you taking orders?

 

[whydontu]

I see you have a step on the outside of the eccentric cams. Would a taper work? So the cam pushes in and down at the same time?

 

[Janger]

Are you taking orders?

Yes. I’ve got an order for 3.

 

[Janger]

I see you have a step on the outside of the eccentric cams. Would a taper work? So the cam pushes in and down at the same time?

A taper would have a lot less contact area. It would then work with different thicknesses of stock. I think the plastic ones would tend to break or get cut up but maybe if they were made of aluminum.

 

[PeterT]

MiteeBite is a good company to harvest clamping ideas. I use the smallest size (8-32) low profile eccentric fixture clamps which are edge clamping so you can machine the upper surface when that is required. But to get the lateral clamping force, the eccentric action is relatively short, which means you need a reduced grid of tapped holes for a general purpose tooling plate and or other creative backing ideas.
For CNC routing & light milling, you might want to look at shop made vacuum holding.

Fixture Clamps

Fixture Clamps The Cam Action MITEE-BITE Fixture Clamp is made up of two simple components: a hardened steel socket cap screw with an offset head and a brass hexagonal washer. - Low profile for quick and easy installation for linear motion guide rails - Cam action...

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PSI Vacuum Gauge

Mitee-Bite Products introduces the only PSI Vacuum Gauge© on the market that allows the user to easily calculate holding force based on the area of vacuum chamber. This gauge will be included with the VacMagic VM300 Base Unit, the Multi-Power Vacuum Pallet and Vacuum Generator. Also available to...

www.miteebite.com

 

[Janger]

in the shop! Plastic hold downs are ok…