40 mm Coin Vise

This is a 40 mm coin vise designed for accurate 2-sided coin milling on Makera Carvera CNC machines.

The vise securely holds 35–40 mm coin blanks while keeping the top and bottom faces accessible for machining. Its registration features allow the vise to be located consistently on the CNC bed so the coin can be flipped for the second side while maintaining accurate alignment.

The vise is designed to be secured using standard push style side or edge clamps clamps, making setup simple without requiring a dedicated fixture plate. See my listing for edge clamps (for coin vise use longer version edge clamps available in listing.

Whether you're machining challenge coins, medallions, tokens, or other small round parts, this fixture provides a repeatable way to hold the blank and maintain registration between Side A and Side B.

🪙 Features

Fits 35–40 mm coin blanks
Designed for accurate 2-sided milling
Repeatable bed registration for maintaining alignment after flipping the coin
Pocketed clamping jaws securely locate and grip the coin
Bolt holes for mounting the vise to the CNC bed
Compatible with standard push/side clamps clamps
Provides access to nearly the entire face of the coin
Designed for machining from aluminum
Suitable for the Makera Carvera, Carvera Air, and Carvera Z1

🔧 Machining the Vise

Tool Used:
3.175 × 12 mm For Metal

Material Used:
The vise can be machined from a single 100×100×5mm aluminum plate using the following setup.

🪙 Using the Vise

Mount the vise to the CNC bed using its registration and mounting features.

Place the 35–40 mm coin blank into the pocketed jaws and tighten the vise securely.

Machine the first side of the coin, remove and flip the coin, then reinstall it into the same registered position for Side B.

The vise and bed registration are designed to minimize movement between setups so the artwork on both sides remains properly aligned.

🎥 Video of the Vise in Action

NOTE: The video uses an earlier version of the vise with a different workholding setup and CAM strategy than the files provided here.

A full machining walkthrough — including machining the aluminum vise and a coin milling demonstration — is available on my Gabriel Maker YouTube channel.

Makera Z1 Challenge Coin → https://www.makerables.com/project/maker-s-challenge-coin-obstacle-is-way-keep

If you use this model and find it helpful, please consider leaving a positive rating. It helps other makers find the project and is greatly appreciated.

Thanks for looking! I hope this fixture is as useful for your coin projects as it has been for mine.

Happy machining! 🪙

用于双面数控铣削的40毫米硬币夹具

用于双面数控铣削的40毫米硬币夹具

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