This is a bearing block for the Igus RJM-01-08 DryLin R Solid Plastic Bearing, 8 mm ID. Many printers have the SC8UU Bearing Block for the LM8UU Linear Bearings. Anyone who has purchased the Igus RJM-01-08 knows the dimensions are not exactly the same as LM8UU linear bearings. The Igus RJM-01-08 is slightly wider and slightly longer making it impossible to use it in the existing SC8UU blocks.
I really like having SC8UU Bearing Blocks for my printer, but wanted to upgrade my LM8UU bearings to the Igus RJM-01-08 bearings. The LM8UU bearings are loud, heavy and once a ball falls out, they are worthless. I searched Thingiverse previously and couldn't find what I was looking for, so I designed a new block from the ground up in Fusion 360.
This block have the same hole pattern as the SC8UU. No drilling required. It should be a drop in replacement for your printer for the Y-Axis. It may be a drop in replacement for the X-Axis depending on how close your bearing blocks are on the X-Axis.
Success using these blocks:
- You will need (qty 4) M4 screws. Any length between 10mm-20mm.
- (qty. 4) M4 nuts.
- (qty 1) 5/8 internal snap ring. Unfortunately your SC8UU has two internal snap rings, but neither can be used They are too small for the new block.
UPDATE: You can use http://www.thingiverse.com/thing:2103292 instead of purchasing the 5/8 internal snap ring to hold bearing in place :D big thanks to http://www.thingiverse.com/BogdanKecman
- Lightly tap the Igus RJM-01-08 bearing into the block with the wider opening. Tap it until it touches the back side. Insert the 5/8 internal snap ring into the wider opening to secure the bearing in the block. The snap ring should fit securely into the groove. Insert the four M4 nuts into the side openings. Secure to printer with M4 screws.
Comparison of weight:
- The original SC8UU with LM8UU Bearing weigh 47 grams each. Quite heavy. My printed block with Igus RJM-01-08 bearing weighs only 18 grams. A noticeable difference especially when you use three blocks on each axis.
- Editable Fusion360 file
Print Settings I used:
- 0.1mm layer height
- 70% infill
- 3 perimeters
UPDATE: If you have the IGUS RJM-01-08. These do fit in your typical metal SC8UU blocks, but if you wanted to lighten up the load with plastic blocks instead, http://www.thingiverse.com/Goerke/ created a version to fit the IGUS RJM-01-08 bearings here http://www.thingiverse.com/thing:2052556
Designed in Fusion360