ER8 ER11 ER16 ER 18 ER 20 ER 25 ER32 ER40 Collet Chuck Spring Collet UAE
The Losning ER Collet is a spring collet used in ER-type collet chucks and collet holders to grip round shank tooling and workpieces on CNC machining centres, lathes and milling machines. It is a core tool-holding component for machinists working with drills, end mills and reamers, and is stocked and supplied by SAN Tools in the UAE from our Dubai Al Quoz, Sharjah and Ajman branches.
Key features
- Full ER size range — available in ER8, ER11, ER16, ER20, ER25, ER32 and ER40 collet sizes to match different holder types and clamping ranges.
- Wide bore range per size — bore diameters run from 1mm up to 32mm across the range, giving fine coverage for common shank sizes.
- Spring collet design — the slotted spring construction closes evenly around round shank tooling for concentric, secure clamping.
- Compatible with standard ER collet chucks — fits standard ER collet nuts and chuck/holder bodies of the matching ER size.
- Sold individually by size — order the exact collet size and bore diameter needed for each tool shank, rather than a fixed set.
Applications
- Holding end mills, drills and reamers in CNC machining centres
- Tool holding on manual and CNC lathes
- Milling machine collet chucks and spindle tooling
- Any application needing precise, repeatable round-shank clamping
Specifications
| Attribute | Detail |
|---|---|
| Vendor / brand | Losning |
| Product type | CNC Tool / Collet Chuck Spring Collet |
| Collet sizes | ER8, ER11, ER16, ER20, ER25, ER32, ER40 |
| Bore diameter range | 1mm to 32mm (range varies by collet size) |
| Sizes / variants available | Each ER size is available across its supported bore diameters, e.g. ER8 (1–5mm), ER11 (1–7mm), ER16 (1–10mm), ER20 (1–13mm), ER25 (1–16mm), ER32 (1–25mm), ER40 (4–27mm) — select collet size and bore on the product page |
How to choose
- Match the ER size to your collet chuck or holder — ER16, ER25 and ER32 are common on milling machines and CNC spindles; check your holder's marking first.
- Match the bore diameter to your tool shank — select the collet whose bore matches your end mill, drill or reamer shank diameter exactly for the best grip and runout.
- Use the smallest ER size that covers your tool range where possible, as smaller collets generally give better runout and rigidity for smaller tools.
- Keep a few nearby bore sizes in stock for common shank diameters used across your job mix.
Frequently asked questions
How do I know which ER size I need?
Check the marking on your collet chuck, collet nut or tool holder — it will state the ER size (e.g. ER25). If unsure, our team can help match your holder to the correct ER collet range.
Can one collet clamp a range of shank diameters?
Each collet is designed for a specific bore diameter with a small clamping range. For best accuracy and grip, choose the collet whose stated bore diameter matches your tool shank.
Is this available with delivery in the UAE?
Yes. Available from our Dubai, Sharjah and Ajman branches with UAE-wide delivery; request a quote or WhatsApp +971 52 132 7742.
Browse all CNC tooling systems and holders or request a quote for your ER collets.