Replacement knob for a D-shaft, 3D printed in PLA

Replacement knob for a D-shaft

A ribbed knob with a pointer line and a D-shaped socket made to your shaft.

Customize
mm
mm
mm
mm

$9.53

Delivered. Printing starts Fri, Nov 6, at your door by Fri, Nov 13.

Color
PLA, Black

Shipping $5.51

Price breakdown
Print 7.0 g, 20 min
$4.02
USPS Ground Advantage
$5.51
Total, before tax
$9.53

33.6 × 33.6 × 18 mm

Customize more in the AI designer: change the shape, add holes or sizes, then order the same way.

What it's for

Lost or cracked a knob? Most appliance and electronics knobs sit on a D-shaft: a round shaft with one flat side. Measure the shaft diameter and the distance across the flat, enter both, and the socket gets 0.15 mm of clearance per side for a snug push fit.

A 6 mm shaft with a 4.6 mm flat is the most common size on washers, dryers, fans, lamps and audio gear. Set the knob 18-60 mm across and 10-35 mm tall. The pointer line on top lines up with the flat.

PLA softens around 55-60 °C. Fine for washers, dryers, fans and electronics; not for knobs that sit over a burner or next to an oven vent.

Sizes and price

Shaft diameter
3-10 mm
Across the flat
2-9.5 mm (the shaft diameter for a round shaft)
Knob
18-60 mm across, 10-35 mm tall
Socket depth
Up to 14 mm
As shown
33.6 × 33.6 × 18 mm
Material
PLA, in black, white, gray, red, blue, green
Price as shown
$9.53 delivered
Four of them
$11.09 delivered

Prices include USPS Ground Advantage shipping anywhere in the US; sales tax is added at checkout where required. A different size or text changes the price; the panel above shows it before you order.

Questions

How do I measure the shaft?

With calipers: the full diameter across the round part, then across the flat to the opposite side. A 6 mm shaft is usually 4.5-4.6 mm across the flat.

What if my shaft is round or knurled?

For a round shaft, enter the same number for both. Knurled (splined) shafts need a different socket: use Customize more and describe the shaft, or ask us.

Will it look like the original?

It is a clean ribbed knob, not a copy of a brand's design. Use Customize more to change the shape or add a skirt.

Can I use it on a stove or grill?

Only where the knob stays cool. PLA softens around 55-60 °C, so not over a burner, next to an oven vent or on a grill lid.

More in 3D Printing Tolerances: How Much Clearance Each Fit Needs (in mm) and How to Measure a Part for 3D Printing: Calipers, Clearance and Test Fits.