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.
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