Appliance Replacement Knob

Replacement knobs for stoves, ovens, dryers and radios

Lost or broke a knob on your stove, oven or dryer? Measure the metal shaft, set the shape and pointer, and print a new one. The hole is made to your measurements, with a little extra room so it slides on.

Free to download. A short ad may play before your file.

One solid body, no colors. Works with every slicer.

Presets
Shaft

Look at the end of the metal shaft. Most stove and oven knobs sit on a 6 mm D-shaft.

mm

Measure across the round part of the shaft with a caliper.

mm

D: from the flat to the round side. Double D: from flat to flat.

mm

How far the shaft sticks out of the panel, minus 1 mm.

Turn the appliance to OFF and look at where the flat of the shaft points.

A small ring with the same hole. Takes a few minutes to print and shows if the fit is right.

Knob
mm
mm
mm
Marking and colors

Raised marks help when you can't see the knob well. In a one-color STL, flush marks are engraved.

Advanced
mm

Extra room around the shaft. Print the test sleeve first: raise this if it is too tight, lower it if it wobbles.

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Printaro can print this design for you. Copy the link to your design and paste it in your message, so we know exactly which settings you chose.

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About this generator

Make a replacement knob for a stove, oven, dryer, washing machine or radio. Measure the shaft, choose a shape and a pointer, and print a knob that fits. Print a test sleeve first to check the fit.

How to use

  1. Turn the appliance off and pull the old knob straight off.
  2. Measure the shaft diameter and, for a D-shaft, the size from the flat to the round side.
  3. Turn on 'Only print a test sleeve', print it and push it on the shaft. Adjust Fit clearance until it slides on firmly.
  4. Turn the test sleeve off, choose the shape and pointer, and print the knob.

Printing tips

  • Print standing on its back, the open hole on the bed. No supports needed.
  • For knobs near a hot cooktop, print in PETG or ASA. PLA softens around 55 °C.
  • Use 4 walls or more so the D-flat doesn't wear round.
  • For a two-color knob, the marking is a separate part in the 3MF: assign the second filament to it.

Helpful guides

Frequently asked questions

How do I measure a D-shaft?

Use a caliper. Shaft diameter is measured across the round part. Size across the flat is measured from the flat face to the round side opposite it. A common stove shaft is 6 mm with 4.6 mm across the flat, but check your own.

The knob is too tight or too loose. What now?

Change Fit clearance under Advanced: up by 0.05 mm if it is too tight, down if it wobbles. The test sleeve lets you try this in a few minutes.

Is a printed knob safe on a gas stove?

Use a heat-resistant material such as PETG or ASA and keep the knob away from the flame. Check that the knob turns the valve fully off before using the stove. If in doubt, buy an original part.

What is the Round + grub screw option?

For round shafts without a flat, such as many radios and amplifiers. The knob gets a 2.7 mm side hole: screw an M3 grub screw into it to clamp the shaft.

Can I make a knob with a scale?

Yes. Choose the shape With skirt and set the number of scale marks and the range. The first mark is longer and sits under the pointer.