Igus RJ4JP-01-08 Drylin Bearing
$2.49
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Quiet, self-lubricating polymer linear bearing for 8 mm shafts. The igus drylin RJ4JP-01-08 is the Japanese-metric, LM8UU-size drylin R sleeve bearing used as a lubricant-free alternative to ball-style LM8UU bearings in 3D-printer motion systems.
Why use drylin instead of a ball LM8UU?
- No grease or oil required: igus lists the drylin 3D-printer products as completely self-lubricating.
- Quieter motion: the all-polymer sleeve design has no recirculating balls, so it avoids the rattle of loose ball-bearing carriages.
- Drop-in sizing: igus identifies RJ4JP-01-08 as the 8 mm Japanese-standard bearing with LM8UU-equivalent dimensions.
Specifications
- Manufacturer / MPN: igus RJ4JP-01-08
- Series: drylin R, RJ4JP-01 Japanese metric all-polymer linear slide bearing
- Shaft size: 8 mm round shaft
- LM8UU-size envelope: 8 mm ID × 15 mm OD × 24 mm length
- Bearing material: iglide J4 polymer
- Sold as: one bearing
Fitment and use
Use this where a 3D-printer design calls for an LM8UU-size bearing on an 8 mm smooth shaft and you want a dry-running polymer sleeve instead of a greased ball bearing. It pairs with 8 mm linear rods such as the Enraged Rabbit Carrot Feeder shafts and threaded rods set.
Gotchas
- This is a plain sleeve bearing, not a ball bearing. It needs proper alignment and a clean shaft to slide freely.
- Do not pack it with bearing grease; the point of drylin is lubricant-free operation.
- Confirm your holder is LM8UU-size before ordering. This is not the longer LM8LUU format.
