Unique-Bargains
Unique-Bargains Compression Springs 7.5 x 20 mm 40 pcs
Set of 40 carbon-steel compression springs, 7.5 mm outer diameter and 20 mm free height, for 3D printer heated beds 3.5 mm thick or more
- Carbon steel gives stronger hold than ordinary steel
- 40 springs let you service several printers at once
- 20 mm free height fits most 3D printer beds
- 5 mm outer diameter matches common bed-plate holes
- 2 mm wire adds fatigue resistance for repeated heating cycles
Compression Springs 7.5 x 20 mm 40 pcs
This set provides forty carbon steel compression springs sized for 3D printer heated beds. Each spring has a free height of 20 mm, an outer diameter of 7.5 mm and a wire diameter of 1.2 mm. The silver finish resists corrosion during repeated thermal cycles.
Suitable For 3.5 mm Aluminium Beds
These springs are recommended for 3.5 mm aluminium bed plates or thicker where strong counter-force keeps the bed level. Printers with thinner plates, glass beds or different mounting hole patterns may not achieve the required preload.
Free Height 20 mm
The critical dimension is the 20 mm free height which determines the available Z travel and bed compliance. Verify that your printer's bed carriage allows this exact length before ordering.
Highlights
- Carbon steel gives stronger hold than ordinary steel
- 40 springs let you service several printers at once
- 20 mm free height fits most 3D printer beds
- 5 mm outer diameter matches common bed-plate holes
- 2 mm wire adds fatigue resistance for repeated heating cycles
Specifications
| Brand | Unique Bargains |
|---|
Questions about this item
How can I verify the springs are compressing correctly after installing them on my 3D printer bed?
The bed should sit level at the free height of 20 mm with no visible coil bind, and the 1.2 mm wire should return to that height after each print cycle without permanent deformation.
What comes in the package and is any additional hardware required for installation?
The box contains 40 carbon-steel compression springs measuring 7.5 mm outer diameter, 5 mm inner diameter and 20 mm free height; no extra parts are included, so ensure your printer uses M3 or similar bed screws that fit the 5 mm bore.
Which spring dimensions should I match to my printer's bed plate thickness?
The manufacturer recommends these 7.5 mm outer diameter by 20 mm free height springs for aluminium bed plates of 3.5 mm thickness or greater.
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