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Sealed ER20-RF Collet – 8 mm – APX (7618)
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Description
Features and Applications:
- ER-RF sealed collet.
- For holding tools with diameters from 6 to 5.1 mm.
- Central cooling through the tool.
- Used in ER20 collet chucks.
- Allowable runout: 0.01 mm.
- Max coolant pressure: 21 bar.
Technical data:
| Parameter | Value |
|---|---|
| d | 8 mm |
| D | 21 mm |
| L | 31,5 mm |
ER standards:
| ER | d1 [mm] |
Clamping range [mm] |
d2 [mm] |
d3 [mm] |
aAT3 | l1 [mm] |
l13 max [mm] |
|---|---|---|---|---|---|---|---|
| ER11 | 1÷7 | 0,5 | 11 | 11,5 | 8° | 18,0 | 6,6 |
| ER16 | 1÷10 | 0,5÷1 | 16 | 17,0 | 8° | 27,5 | 10,6 |
| ER20 | 1÷13 | 0,5÷1 | 20 | 21,0 | 8° | 31,5 | 11,5 |
| ER25 | 1÷16 | 0,5÷1 | 25 | 26,0 | 8° | 34,0 | 12 |
| ER32 | 1÷20 | 0,5÷1 | 32 | 33,0 | 8° | 40,0 | 13 |
| ER40 | 1÷30 | 1 | 40 | 41,0 | 8° | 46,0 | 15 |
Mounting collets in nuts:
To properly install an ER collet in the holder, you should:
- Insert the collet at an angle into the nut.
- Hook the collet groove onto the eccentric or cylindrical protrusion of the nut (fig. A).
- Press the collet into the nut (fig. B).
- Screw the nut with the pressed collet onto the holder to allow mounting of the workpiece tool.
Maximum clamping diameters depending on the ER collet type:
Availability is for informational purposes based on data from APX and may differ from the actual stock. Please contact us before purchase to confirm current inventory.
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