Workshop consumables that secure tool shanks for precise milling and engraving are essential, and the SainSmart Genmitsu ER11 Collet Set promises reliable clamping across a common range. Confident toolholding reduces vibration and sloppy cuts, giving cleaner results and less wasted material. Does the set deliver the concentricity and durability needed for everyday CNC work?
⚡ At a Glance
- • Gripping Precision: Consistent concentric hold for 1mm to 7mm shanks, run-out tolerance 0.01mm
- • Best for: Hobbyists and small workshops using CNC milling, routing and engraving tools
- • Not ideal for: Users needing collets for shanks larger than 7mm or specialised industrial systems
Seven ER11 collets cover 1mm to 7mm sizes, made of formulated spring steel. Run-out tolerance is specified at 0.01mm, supporting accurate, repeatable toolholding.
Accurate concentric gripping, with the ER11 1mm–7mm range
ER11 collets compress around a tool shank as the nut tightens, centring the bit inside the spindle. Supplied sizes from 1mm to 7mm remove the need for frequent adapters when switching common small-shank cutters.
Secure clamping helps reduce tool wobble and chatter, producing cleaner cuts and more predictable results when milling or engraving. Fewer false starts and scrap pieces mean more efficient workshop time.
Stable tolerance control, with precision grinding and low run-out
Collets are hardened and precision ground to control concentricity, and run-out tolerance is specified at 0.01mm, which keeps the cutter's axis close to the spindle axis during rotation.
Tighter run-out helps maintain surface finish and prolong cutter life by reducing uneven wear. Accurate results are particularly useful for fine engraving and small-diameter end mill work.
Durable clamping, thanks to formulated spring steel construction
Manufactured from formulated spring steel, the collets combine spring action for gripping and a hardened finish for wear resistance. The set format, with seven sizes, reduces overuse of a single collet size.
Durable materials and correct size matching reduce deformation and prolong service life, lowering the need for frequent replacements. Users can rely on consistent fit across routine tool changes.
✨ The 4 Key Reasons for SainSmart Genmitsu ER11 Collet Set
- Size Coverage 1–7mm, ensures direct fit for most small shank router and end mill bits, avoiding adapters
- Formulated Spring Steel, resists deformation under repeated clamping for longer use
- Hardened and Precision Ground, preserves concentricity after repeated tool changes
- Responsive Customer Support, users report helpful service for fitment and replacement queries
📋 Technical Details at a Glance
- Category: Home Improvement, CNC accessories
- Collet Type: ER11 spring collets
- Gripping Range: 1mm to 7mm
- Sizes Included: 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm
- Material: Formulated spring steel
❓ Frequently Asked Questions
Q: What sizes are included in the set?
A: The set includes seven ER11 collets sized 1mm, 2mm, 3mm, 4mm, 5mm, 6mm and 7mm.
Q: What material are the collets made from?
A: Collets are made of formulated spring steel and are described as hardened and precision ground.
Q: How accurate are the collets in terms of run-out?
A: Run-out tolerance is specified at 0.01mm, or 0.0006 inches.
🏆 Our Verdict
The SainSmart Genmitsu ER11 Collet Set is suitable for hobbyists and small workshops that need reliable, small-shank toolholding. Hardened spring steel construction and a specified 0.01mm run-out tolerance deliver repeatable clamping and cleaner cuts. The set represents a practical workshop investment, offering durable parts and straightforward compatibility with common CNC and engraving setups.
