Boka ER20 precision collets 0.01mm concentricity size 2-13mm
Boka ER20 precision collets 0.01mm concentricity size 2-13mm - ER20-2mm is backordered and will ship as soon as it is back in stock.
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Delivery and transport
Delivery and transport
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SHIPPING OPTIONS
GEM Maschinen GmbH uses DHL or freight forwarding services to ship your orders. Orders are processed within 24 hours of receipt. A shipping confirmation will be sent via email.
SHIPPING COSTS
OVERWEIGHT ITEMS
Orders shipped via freight are subject to additional charges for overweight items, as indicated on the respective product page. Customers are responsible for any additional charges, such as lift tables, when shipping by truck.
- Over 30 kg within Germany.
- Over 30 kg outside Germany.
Return conditions
- In case of manufacturer defects or quality defects: Free return and full refund.
- For returns not due to quality defects: The customer bears the return shipping costs. If the product arrives in perfect, resalable condition upon receipt (no impairment of resaleability), we do not charge the 15 percent wear and tear fee.
Boka ER20 precision collets 0.01mm concentricity size 2-13mm
Boka ER20 precision collets 0.01mm concentricity size 2-13mm
Discover the Boka ER20 high-precision collet series . Made of hardened 65Mn steel , they offer 0.01mm concentricity (4×D) and are compatible with all ER20 collet chucks . Designed for milling, turning, and drilling machines, they feature durability and increased wear resistance . This is achieved through thermal aging and cryogenic treatment . Optimal performance is ensured by full tool shank insertion.
Interested in a complete set? Check out our ER series set here.
Product advantages
- High concentricity: Our Boka ER20 collets offer a concentricity of less than 0.01 mm (measured at 4×D), enabling high tool concentricity and reduced machining errors. Ideal for precise applications.
- Quality material & hardening: Manufactured from high-quality, alloyed 65Mn spring steel and fully hardened. This ensures high strength, elasticity, and a long service life of the collet under demanding conditions.
- Improved durability through process: Each collet undergoes a thermal aging process to eliminate grinding stresses and a comprehensive cryogenic treatment to increase wear resistance and dimensional stability.
- Secure tool holding: Specially designed for cylindrical tool shanks. For optimal clamping performance and tool life, the tool shank should always be fully inserted into the collet.
- Standard-compliant compatibility: Boka ER20 collets comply with industry standards and are compatible with common ER20 collet chucks. This offers a flexible solution for your existing machines and tools.
Technical data
| Article | ER20-2 | ER20-3 | ER20-4 | ER20-5 | ER20-6 | ER20-7 | ER20-8 | ER20-9 | ER20-10 | ER20-11 | ER20-12 | ER20-13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SKU | 56030801 | 56030802 | 56030803 | 56030804 | 56030805 | 56030806 | 56030807 | 56030808 | 56030809 | 56030810 | 56030811 | 56030812 |
| Model | ER20-2mm | ER20-3mm | ER20-4mm | ER20-5mm | ER20-6mm | ER20-7mm | ER20-8mm | ER20-9mm | ER20-10mm | ER20-11mm | ER20-12mm | ER20-13mm |
| Size (d) | 2mm | 3mm | 4mm | 5mm | 6mm | 7mm | 8mm | 9mm | 10mm | 11mm | 12mm | 13mm |
| clamping area | 2mm - 1mm | 3mm - 2mm | 4mm - 3mm | 5mm - 4mm | 6mm - 5mm | 7mm - 6mm | 8mm - 7mm | 9mm - 8mm | 10mm - 9mm | 11mm - 10mm | 12mm - 11mm | 13mm - 12mm |
| Diameter (D) | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm | 21mm |
| Total length (L) | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm | 31mm |
| Concentricity | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm | ≤ 0.01mm |
| form | Around | Around | Around | Around | Around | Around | Around | Around | Around | Around | Around | Around |
| Material type | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel | Alloy Steel |
| Packaging dimensions (mm) | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 | 25*25*35 |
| Gross weight (kg) | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.02 |
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