If two or more recirculating units are arranged next to or behind one another, they need to be ordered (matched in pairs) with the add-on designation GP.
The types in bold are standard. Types in size 12 are available on request.
Manufacturing Tolerances and Group Tolerances
| Type | Manufacturing tolerances in mm | Group tolerances in µm within pairs | ||
|---|---|---|---|---|
| A | B | A | B | |
| SK 1, 2 | 0/-0.1 | +/-0.005 | 2 | 2 |
| SK 3, 6, 9, 121) | 0/-0.1 | +/-0.005 | 3 | 3 |
| SKD 6, 9, 121) | 0/-0.1 | +/-0.005 | 3 | 3 |
| SKC 6, 9 | 0/-0.1 | +/-0.005 | 3 | 3 |
| SR 2 | 0/-0.1 | +/-0.005 | 2 | 2 |
| SR 3, 6, 9, 121) | 0/-0.1 | +/-0.005 | 3 | 3 |
1) Types of size 12 are only available on request
Markings
The recirculating units in the same group are designated with a number, i.e. the same number corresponds to the exact same tolerance group.
NRT Markings
| Type | Manufacturing tolerance A | Sorts in µm | Markings |
|---|---|---|---|
| NRT | -0.025 | -20 to -25 | white |
| -15 to -20 | green | ||
| -10 to -15 | yellow | ||
| -5 to -10 | blue | ||
| 0 to -5 | red |
Colored rings around the lube nipple mark the relevant tolerance group.
