OCR Heated Bed Compression Spring 7.5mm For 3D Printer Extruder DIY Accessories 10pcs

The springs are the size they advertise, but I didn't realize my original springs were 24mm long. To those with a CR-10s (S-4 and S-5), you will need to buy fender washers to make up the difference, by placing them under the spring. I used 4 on each corner, and 2 on the corner with the plastic bracket for the heater power cord connector.As for performance, I noticed the bed and carriage wobble have been dramatically reduced, allowing me to increase my print times from 5 to 15% faster on various models and filament types. It also dampened vibrations to the frame, and table greatly as well.If your aluminum bed plate is 3.5mm or thicker, it should be fine. To test some of the spring's attributes (while my tests weren't conventional or scientific) I was able to compress the spring down to 14mm in length, with 15 pounds and 2.8 oz of pressure (6.8 kg or 66.7 N of force)I would not recommend these springs for heated beds that are under 220mm in size, since smaller beds tend to use thinner aluminum plates that can stress under the pressure and heat.I hope this was helpful.

I needed to make an adjustable base for a  Pillow Block Bearing  so I can adjust the height at will as I am testing different motors that vary in height. I was skeptical at first because these are advertised as "Heated Bed Compression Springs" but these springs were the closest thing I can find that would work for my needs. Turns out they work great for what I needed. These springs are of good quality and take a plenty of force to fully compress them. Using the index and thumb, I can compress them for about 5mm.They are 20mm long and will work with M5 screws. If you need springs and the dimensions is right for you, I highly recommend them.

These springs are stiff, and I couldn't get them to work as intended for my bed. Ended up using one for my extruder (which works way better now) though I had to cut two coils off to make it work. If you need extremely stiff springs with little give, then these may work for you.

I bought these springs to replace the ones that cam with Spray bottle triggers. The original springs melted away with bleach or almost any other insecticides or pesticides. These springs match the dimensions perfectly, only thing it is stiffer than the original . . which for me, turn out to be better. I shared out springs to all my relatives who have the same issue.

These are far a improvement over the stock springs. Heavy duty and tight tension less time to have to level your bed.I would recommend these to others.

These ended up being about a half an inch longer than my original compression springs (I had original Maker Select v2 hardware). But I was able to raise the level switch a step and managed to get everything working. The springs are very strong and I think they’ll hold level much better than the originals.

Adding these to my Ender 3 Pro's bed to stiffen it up even more.

Good bundle of springs, but they may be too thick for manual leveling print beds. Be wary about which Y Carriage you use, and the limits of your 3D printer. These compression springs are pretty strong, so they definitely have the power to warp your carriage plate and even your heat bed. Happened to mine after having installed them for a few days. You won't notice it right away but you'll start to see print problems after a day or two. Be especially wary when using these on a Maker Select V2, which has a notoriously thin stock Y Carriage and an aluminum heat bed.