ER20 Collet
Specifications
Tolerance: 1mm
Overal Length: 31.5mm
Diameter: 21mm
Standard: DIN6499/ISO15488
8° back taper, 30° front nose taper
Clamping Tolerance: 1mm (ID ? 3mm), 0.5mm (ID < 3mm
Used for drills, taps, mills and reamers, etc.
ER20 Selection Chart
| Part No. |
Nominal Size |
Tolerance |
Clamping Range |
Overall Legth |
Diameter |
| ER20-8 |
8mm |
1mm |
8-7mm |
31.5mm |
21mm |
| ER20-6 |
6mm |
1mm |
6-5mm |
31.5mm |
21mm |
| ER20-5 |
5mm |
1mm |
5-4mm |
31.5mm |
21mm |
| ER20-4 |
4mm |
1mm |
4-3mm |
31.5mm |
21mm |
| ER20-3 |
3mm |
1mm |
3-2mm |
31.5mm |
21mm |
| ER20-12 |
12mm |
1mm |
12-11mm |
31.5mm |
21mm |
| ER20-10 |
10mm |
1mm |
10-9mm |
31.5mm |
21mm |
| ER20-1/4 |
1/4'' |
1mm |
0.211 - 0.25'' |
31.5mm |
21mm |
| ER20-1/2 |
1/2'' |
1mm |
0.461 - 0.5'' |
31.5mm |
21mm |
Dimension
Assembly Instruction
