Step 2Rollers
The rollers carry the spool: the spool sides sit in them and the spool turns on them. They are the same in both versions of the device. There are eight in every device. One assembly is made of an aluminium axis, two 608 bearings and two rollers, so the device needs four assemblies, that is four axes. The axis is turned, 71 mm long, with an M8 thread 15 mm long at both ends.
Turned or bought. You can turn the rollers from nylon, or print them. The ready-made mechanical set (spacer posts and nylon rollers) is in our e-shop.
What you will need
| Qty | Part | Note |
|---|---|---|
| 2 (8 in all) | 02-01-020a-ROLL | Roller. Turned from nylon, printed, or from the e-shop |
| 1 (4 in all) | 02-01-021-AXIS M8x15 | Aluminium, 71 mm, M8 x 15 thread at both ends |
| 2 (8 in all) | Bearing ZKL 608-2RS | |
| 2 (8 in all) | Washer 8x12 | As in the drawing, on each side |
| 2 (8 in all) | Washer 8x16 | |
| 2 (8 in all) | Screw M8x20 |
The table is for one assembly. The device has four axes, that is four assemblies. So there are 4 axes, and 8 rollers, bearings, washers and screws, because they go on each end of an axis.
Assembly
1. Fit the washers and bearings
On each end of the axis put a washer 8x12 and a washer 8x16, then a bearing 608-2RS.
2. Fit the rollers
Put a roller ROLL on each bearing. The roller must turn freely on the bearing.
3. Secure with the screws
Secure the assembly from both sides with an M8x20 screw into the thread at the end of the axis.
The video opens after you buy this guide.See the plans →
Putting it into the body
4. Put the assembly into the arm
Put the finished assembly into the arm as in the picture. Check that both rollers turn freely.