dfh.fm
Shim Washers
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Metric shim washers for 3D-printer motion alignment. Sold in packs of 100, with M3- and M5-size options for tuning bearing, pulley, and idler stacks without relying on the loose thickness of standard washers.
Why use shims instead of general washers?
- Voron documentation notes that standard M5 washers can vary by ±0.2 mm, and recommends 1 mm shims or 0.5 mm washers when pulley and bearing alignment needs fine adjustment.
- Thin shims can be stacked to dial in spacing in small increments instead of forcing a belt path or bearing stack to accept whatever washer you have on hand.
- Useful around motion hardware, including F623-RS Bearings and F695-2RS Flanged Ball Bearings, when the assembly needs a small spacing correction.
Specifications
- Pack quantity: 100 shim washers
- Available sizes: 3 x 6 x 0.5 mm, 5 x 10 x 0.5 mm, and 5 x 10 x 1 mm
- Size format: inside diameter x outside diameter x thickness
- Use case: precision spacing for 3D-printer motion, bearing, pulley, and idler assemblies
Fitment notes
- 3 x 6 mm shims fit M3 hardware stacks where the outside diameter must stay compact.
- 5 x 10 mm shims fit M5 hardware stacks; choose 0.5 mm for fine adjustment or 1 mm when replacing a nominal 1 mm washer with tighter spacing control.
- Common fit context includes Voron V0, V1, V2, Trident/Switchwire-style motion assemblies, and other printer builds that need pulley or bearing spacing tuned during assembly.
What this is not
- Not a structural washer kit for general load spreading.
- Not a mixed assortment; select the exact size you need from the variants.
- Check your manual and measure the stack before ordering; shim thickness is selected by the gap you need to correct.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.




