Products for bench top machinists | LittleMachineShop.com

Potentiometer, FC Controllers

Potentiometer, FC Controllers - Main image
$9.27 $14.95 In stock

This speed control potentiometer works an mini lathes and mini mills where the part number on the circuit board begins with FC. It has a switch on the back that is used with the emergency stop switch on some mini mills and mini lathes. If your machine doesn't have an emergency stop switch, simply ignore the switch contacts.

This is a 4.7K potentiometer with a switch. The switch contacts are closed when the switch is in the fully counter clockwise (off) position.
Item has the following numbers on the back: WH24-2 F4K7.

Use this potentiometer with motor controller boards where the part number begins with FC

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

John ★★★★★

Took a chance on this matching the FC board number and it paid off—the emergency stop switch wiring hooks right up to that back switch, no fiddling. Installed in under ten minutes on my mini lathe and the speed control is smooth through the whole range.

Victoria ★★★★★

The switch on the back lined up perfectly with my mini lathe's emergency stop setup, so installation took only a few minutes. It's a direct fit for the FC circuit board, which saved me the trouble of modifying anything.

Eli ★★★★★

I was relieved to find this potentiometer matched the FC-labeled circuit board on my mini lathe perfectly, no guesswork needed. The rear switch for the emergency stop is a thoughtful safety touch that gives me peace of mind during operation.