Collection: Royal ER-25 Ultra-Precision Collets
Royal ER-25 Ultra-Precision Collets are the industry standard for high-accuracy CNC machining. Available in Standard, Sealed, and Complete Sets, these collets are manufactured from high-grade German steel and are guaranteed to maintain 0.0002" TIR or better.
Whether you are running high-speed milling operations or high-pressure thru-coolant drilling, the Royal ER-25 series provides the rigidity and concentricity required to maximize tool life and improve surface finishes.
Choose Your ER-25 Category:
- ER-25 Standard (Inch & Metric): Features a 16-slot design for 360-degree contact and a wide collapse range (up to 1mm or 1/32"). Ideal for general-purpose high-precision milling and drilling.
- ER-25 Sealed (Coolant-Through): Specifically designed for thru-coolant tools. These feature a mechanical steel seal rated to 1,400 PSI. Note: These have no collapse range and require a 1:1 fit with your tool shank.
- ER-25 Collet Sets: The most cost-effective way to outfit a new machine. Available in 14, 15, and 16-piece configurations for both Inch and Metric sizes.
Comparison: Standard vs. Sealed ER-25
| Feature | Standard ER-25 | Sealed ER-25 |
|---|---|---|
| Accuracy (TIR) | 0.0002" | 0.0002" |
| Coolant Rating | Standard / Flood | Thru-Coolant (1,400 PSI) |
| Collapse Range | 0.039" (1.0mm) | None (1:1 Fit Required) |
| Material | Hardened German Steel | Hardened Steel w/ Mechanical Seal |
Why Choose Royal ER-25 Collets?
- Reduced Tool Wear: The ultra-precision 0.0002" TIR ensures that every flute of your cutting tool shares the load equally, preventing premature edge chipping.
- Superior Grip: The 16-slot design provides significantly more gripping force than standard 6 or 8-slot economy collets.
- B2B Value: All orders over $100.00 qualify for Free Shipping, making it easy to save when ordering sets or multiple replacement collets.
ER-25 Standard Inch Collets |
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|---|---|---|---|
| Part # | Size | Collapse Range | Purchase Link |
| 53090 | 1/16" | 0.062"–0.043" | View Product |
| 53092 | 3/32" | 0.093"–0.054" | View Product |
| 53094 | 1/8" | 0.125"–0.086" | View Product |
| 53096 | 5/32" | 0.156"–0.117" | View Product |
| 53098 | 3/16" | 0.187"–0.148" | View Product |
| 53100 | 7/32" | 0.218"–0.179" | View Product |
| 53102 | 1/4" | 0.250"–0.211" | View Product |
| 53104 | 9/32" | 0.281"–0.242" | View Product |
| 53106 | 5/16" | 0.312"–0.273" | View Product |
| 53108 | 11/32" | 0.343"–0.304" | View Product |
| 53110 | 3/8" | 0.375"–0.336" | View Product |
| 53112 | 13/32" | 0.406"–0.367" | View Product |
| 53114 | 7/16" | 0.437"–0.398" | View Product |
| 53116 | 15/32" | 0.468"–0.429" | View Product |
| 53118 | 1/2" | 0.500"–0.461" | View Product |
| 53120 | 17/32" | 0.531"–0.492" | View Product |
| 53122 | 9/16" | 0.562"–0.523" | View Product |
| 53124 | 19/32" | 0.593"–0.554" | View Product |
| 53126 | 5/8" | 0.625"–0.586" | View Product |
ER-25 Sealed Inch Collets (1,400 PSI) |
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|---|---|---|---|
| Part # | Size | Collapse Range | Purchase Link |
| 56094 | 1/8" | None (1:1 Fit) | View Product |
| 56096 | 5/32" | None (1:1 Fit) | View Product |
| 56098 | 3/16" | None (1:1 Fit) | View Product |
| 56100 | 7/32" | None (1:1 Fit) | View Product |
| 56102 | 1/4" | None (1:1 Fit) | View Product |
| 56104 | 9/32" | None (1:1 Fit) | View Product |
| 56106 | 5/16" | None (1:1 Fit) | View Product |
| 56108 | 11/32" | None (1:1 Fit) | View Product |
| 56110 | 3/8" | None (1:1 Fit) | View Product |
| 56112 | 13/32" | None (1:1 Fit) | View Product |
| 56114 | 7/16" | None (1:1 Fit) | View Product |
| 56116 | 15/32" | None (1:1 Fit) | View Product |
| 56118 | 1/2" | None (1:1 Fit) | View Product |
| 56120 | 17/32" | None (1:1 Fit) | View Product |
| 56122 | 9/16" | None (1:1 Fit) | View Product |
| 56124 | 19/32" | None (1:1 Fit) | View Product |
| 56126 | 5/8" | None (1:1 Fit) | View Product |
ER-25 Standard Metric Collets |
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|---|---|---|---|
| Part # | Size | Collapse Range | Purchase Link |
| 53502 | 2mm | 2mm - 1mm | View Product |
| 53504 | 3mm | 3mm - 2mm | View Product |
| 53506 | 4mm | 4mm - 3mm | View Product |
| 53508 | 5mm | 5mm - 4mm | View Product |
| 53510 | 6mm | 6mm - 5mm | View Product |
| 53512 | 7mm | 7mm - 6mm | View Product |
| 53514 | 8mm | 8mm - 7mm | View Product |
| 53516 | 9mm | 9mm - 8mm | View Product |
| 53518 | 10mm | 10mm - 9mm | View Product |
| 53520 | 11mm | 11mm - 10mm | View Product |
| 53522 | 12mm | 12mm - 11mm | View Product |
| 53524 | 13mm | 13mm - 12mm | View Product |
| 53526 | 14mm | 14mm - 13mm | View Product |
| 53528 | 15mm | 15mm - 14mm | View Product |
| 53530 | 16mm | 16mm - 15mm | View Product |
ER-25 Sealed Metric Collets (1,400 PSI) |
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|---|---|---|---|
| Part # | Size | Collapse Range | Purchase Link |
| 56504 | 3mm | None (1:1 Fit) | View Product |
| 56506 | 4mm | None (1:1 Fit) | View Product |
| 56508 | 5mm | None (1:1 Fit) | View Product |
| 56510 | 6mm | None (1:1 Fit) | View Product |
| 56512 | 7mm | None (1:1 Fit) | View Product |
| 56514 | 8mm | None (1:1 Fit) | View Product |
| 56516 | 9mm | None (1:1 Fit) | View Product |
| 56518 | 10mm | None (1:1 Fit) | View Product |
| 56520 | 11mm | None (1:1 Fit) | View Product |
| 56522 | 12mm | None (1:1 Fit) | View Product |
| 56524 | 13mm | None (1:1 Fit) | View Product |
| 56526 | 14mm | None (1:1 Fit) | View Product |
| 56528 | 15mm | None (1:1 Fit) | View Product |
| 56530 | 16mm | None (1:1 Fit) | View Product |
ER-25 Complete Collet Sets |
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|---|---|---|---|
| Part # | Set Description | Range / Steps | Purchase Link |
| 53306 | Standard Inch Set (16-Piece) | 5/32" - 5/8" x 32nds | View Product |
| 56306 | Sealed Inch Set (16-Piece) | 1/8" - 5/8" x 32nds | View Product |
| 53706 | Standard Metric Set (15-Piece) | 2 - 16mm x 1mm | View Product |
| 56706 | Sealed Metric Set (14-Piece) | 3 - 16mm x 1mm | View Product |