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Ten silver carbon-steel compression springs 7.5 mm diameter 20 mm free height

Unique-Bargains

Unique-Bargains 3D Printer Bed Springs 7.5 x 20 mm 10pcs

SKU CH-A7GG-M78FA

Ten carbon-steel compression springs measuring 20 mm free height and 7.5 mm outer diameter for levelling 3D printer heated beds

  • Carbon steel gives stronger bed leveling than ordinary steel
  • 20 mm free height fits most 3D printer beds
  • 5 mm outer diameter matches common mounting points
  • 2 mm wire diameter provides consistent spring tension
  • Pack of 10 springs covers full bed replacement

3D Printer Bed Springs 10 Pack

These carbon-steel compression springs replace worn bed-leveling springs on most 3D printers. The pack contains ten silver springs sized for standard M3 bed screws and compatible with a wide range of machines.

Free Height 20 mm Limits Travel

Each spring has a free height of 20 mm, an outer diameter of 7.5 mm, an inner diameter of 5 mm and a wire diameter of 1.2 mm. The 20 mm free height sets the maximum usable compression before the coils bind, limiting Z-axis adjustment range on printers with tall bed stacks.

3.5 mm Plate Thickness Minimum

The manufacturer recommends using these springs with a 3.5 mm aluminium bed plate or thicker. Thinner plates may not provide enough clamping force to keep the bed stable during rapid moves, making the springs unsuitable for ultra-light builds.

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Price $4.99
Cheaper than about 99% of the 5,855 comparable items (median $91.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

How do I know if the 7.5 mm outer diameter and 20 mm free height springs will fit my printer bed?

Measure the existing bed springs or the mounting holes; these springs have a 7.5 mm outer diameter, 5 mm inner diameter and 20 mm free height, so they suit beds designed for those dimensions.

What does the 1.2 mm wire diameter mean for bed levelling stability?

The 1.2 mm carbon-steel wire gives a firmer compression rate than thinner wire, reducing bed bounce during fast moves and helping the 3.5 mm or thicker aluminium plate stay level.

Are these springs limited to a specific printer interface or mounting standard?

No proprietary interface is required; the 7.5 mm outer diameter and 20 mm length match the common compression-spring mounts used on many 3D printer heated beds.

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