Ultra-Precision ER Collets

Inch and Metric Sizes

Royal ER Collets are available in both inch and metric sizes. This optimizes the surface contact between the collet and cutting tool and results in higher accuracies, stronger grip force, better part finishes, and longer cutting tool life.

Extremely Accurate

Runout is guaranteed to be 6 microns (0.0002″) TIR, or better. Each collet is inspected to this standard prior to shipping.

Heavy Duty Construction

Royal ER Collets are made from high-grade steels imported from Germany and are hardened for long life.

Sealed Models Available

For precise coolant delivery to the tip of the cutting tool.

Large Inventory

All sizes are in-stock, ready for immediate shipment.

Wide Gripping Range

Royal standard ER Collets contain 16 slots, providing a larger gripping range than other brands.

Great Value

Very competitive prices make these high-quality ER Collets the best value in the industry.

Royal Sealed Ultra-Precision ER Collets

Ultra-Precision Accuracy – 0.0002″ TIR guaranteed.
High-pressure approved to 1400 psi.
Unique design is mechanically sealed by virtue of the rear slots terminating prior to the annular groove, completely blocking the path of coolant flow to the front of the collet.
When using thru-coolant cutting tools, these collets ensure 100% coolant delivery to the tip of the cutting tool.
Superior to collets sealed with silicone/rubber plugs because plugs are limited to lower operating pressures and are subject to wear.
Unlike standard ER collets, sealed models do not have a wide collapsibility range, requiring the collet bore to be matched to the cutting tool shank diameter.

A Perfect Match to Your Cutting Tool Diameter

All Royal ER Collets are available from stock in both inch and metric sizes. This is very important because it enables you to select a collet that has been ground to your precise cutting tool size.

Using a collet that is perfectly matched to the cutting tool diameter ensures that full surface contact is achieved, resulting in higher gripping force, better accuracy, less vibration, better surface finishes, and longer tool life.

Other Brands

Single Point Contact when Using Metric Collets to Hold Inch-Sized Tooling, or Vise Versa

Royal Brand

Full Surface Contact Because Royal ER Collets are Ground to Exact Inch and Metric Sizes

Royal ER-11 Ultra-Precision Standard ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄16″	1⁄64″	ER-11	Standard	53002	$37.00	Max: Min: 0 Step: 1 Add
3⁄32″	1⁄64″	ER-11	Standard	53004	$37.00	Max: Min: 0 Step: 1 Add
1⁄8″	1⁄64″	ER-11	Standard	53006	$37.00	Max: Min: 0 Step: 1 Add
5⁄32″	1⁄64″	ER-11	Standard	53008	$37.00	Max: Min: 0 Step: 1 Add
3⁄16″	1⁄64″	ER-11	Standard	53010	$37.00	Max: Min: 0 Step: 1 Add
7⁄32″	1⁄64″	ER-11	Standard	53012	$37.00	Max: Min: 0 Step: 1 Add
1⁄4″	1⁄64″	ER-11	Standard	53014	$37.00	Max: Min: 0 Step: 1 Add

Royal ER-11 Ultra-Precision Standard ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1mm	0.5mm	ER-11	Standard	53402	$37.00	Max: Min: 0 Step: 1 Add
2mm	0.5mm	ER-11	Standard	53404	$37.00	Max: Min: 0 Step: 1 Add
3mm	0.5mm	ER-11	Standard	53406	$37.00	Max: Min: 0 Step: 1 Add
4mm	0.5mm	ER-11	Standard	53408	$37.00	Max: Min: 0 Step: 1 Add
5mm	0.5mm	ER-11	Standard	53410	$37.00	Max: Min: 0 Step: 1 Add
6mm	0.5mm	ER-11	Standard	53412	$37.00	Max: Min: 0 Step: 1 Add
7mm	0.5mm	ER-11	Standard	53414	$37.00	Max: Min: 0 Step: 1 Add

Royal ER-11 Ultra-Precision Sealed ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄8″	No range*	ER-11	Sealed	56006	$41.00	Max: Min: 0 Step: 1 Add
5⁄32″	No range*	ER-11	Sealed	56008	$41.00	Max: Min: 0 Step: 1 Add
3⁄16″	No range*	ER-11	Sealed	56010	$41.00	Max: Min: 0 Step: 1 Add
7⁄32″	No range*	ER-11	Sealed	56012	$41.00	Max: Min: 0 Step: 1 Add
1⁄4″	No range*	ER-11	Sealed	56014	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-11 Ultra-Precision Sealed ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
3mm	No range*	ER-11	Sealed	56406	$41.00	Max: Min: 0 Step: 1 Add
4mm	No range*	ER-11	Sealed	56408	$41.00	Max: Min: 0 Step: 1 Add
5mm	No range*	ER-11	Sealed	56410	$41.00	Max: Min: 0 Step: 1 Add
6mm	No range*	ER-11	Sealed	56412	$41.00	Max: Min: 0 Step: 1 Add
7mm	No range*	ER-11	Sealed	56414	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-11 Ultra-Precision Collet Sets

COLLET SERIES	ER COLLET TYPE	RANGE	NUMBER OF COLLETS IN SET	PART NUMBER	PRICE
ER-11	Standard	1⁄16″ - 1⁄4″ x 32nds	7	53300	$259.00	Max: Min: 0 Step: 1 Add
ER-11	Standard	1 - 7mm x 1mm	7	53700	$259.00	Max: Min: 0 Step: 1 Add

*Unlike standard ER collets, sealed models do not have a wide collapsibility range and therefore must be sized to the cutting tool diameter.

Royal ER-16 Ultra-Precision Standard ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄16″	0.062″–0.043″	ER-16	Standard	53020	$37.00	Max: Min: 0 Step: 1 Add
3⁄32″	0.093″–0.054″	ER-16	Standard	53022	$37.00	Max: Min: 0 Step: 1 Add
1⁄8″	0.125″–0.086″	ER-16	Standard	53024	$37.00	Max: Min: 0 Step: 1 Add
5⁄32″	0.156″–0.117″	ER-16	Standard	53026	$37.00	Max: Min: 0 Step: 1 Add
3⁄16″	0.187″–0.148″	ER-16	Standard	53028	$37.00	Max: Min: 0 Step: 1 Add
7⁄32″	0.218″–0.179″	ER-16	Standard	53030	$37.00	Max: Min: 0 Step: 1 Add
1⁄4″	0.250″–0.211″	ER-16	Standard	53032	$37.00	Max: Min: 0 Step: 1 Add
9⁄32″	0.281″–0.242″	ER-16	Standard	53034	$37.00	Max: Min: 0 Step: 1 Add
5⁄16″	0.312″–0.273″	ER-16	Standard	53036	$37.00	Max: Min: 0 Step: 1 Add
11⁄32″	0.343″–0.304″	ER-16	Standard	53038	$37.00	Max: Min: 0 Step: 1 Add
3⁄8″	0.375″–0.336″	ER-16	Standard	53040	$37.00	Max: Min: 0 Step: 1 Add
13⁄32″	0.406″–0.367″	ER-16	Standard	53042	$37.00	Max: Min: 0 Step: 1 Add

Royal ER-16 Ultra-Precision Standard ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1mm	1mm - 0.5mm	ER-16	Standard	53430	$37.00	Max: Min: 0 Step: 1 Add
2mm	2mm - 1mm	ER-16	Standard	53432	$37.00	Max: Min: 0 Step: 1 Add
3mm	3mm - 2mm	ER-16	Standard	53434	$37.00	Max: Min: 0 Step: 1 Add
4mm	4mm - 3mm	ER-16	Standard	53436	$37.00	Max: Min: 0 Step: 1 Add
5mm	5mm - 4mm	ER-16	Standard	53438	$37.00	Max: Min: 0 Step: 1 Add
6mm	6mm - 5mm	ER-16	Standard	53440	$37.00	Max: Min: 0 Step: 1 Add
7mm	7mm - 6mm	ER-16	Standard	53442	$37.00	Max: Min: 0 Step: 1 Add
8mm	8mm - 7mm	ER-16	Standard	53444	$37.00	Max: Min: 0 Step: 1 Add
9mm	9mm - 8mm	ER-16	Standard	53446	$37.00	Max: Min: 0 Step: 1 Add
10mm	10mm - 9mm	ER-16	Standard	53448	$37.00	Max: Min: 0 Step: 1 Add

Royal ER-16 Ultra-Precision Sealed ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄8″	No range*	ER-16	Sealed	56024	$41.00	Max: Min: 0 Step: 1 Add
5⁄32″	No range*	ER-16	Sealed	56026	$41.00	Max: Min: 0 Step: 1 Add
3⁄16″	No range*	ER-16	Sealed	56028	$41.00	Max: Min: 0 Step: 1 Add
7⁄32″	No range*	ER-16	Sealed	56030	$41.00	Max: Min: 0 Step: 1 Add
1⁄4″	No range*	ER-16	Sealed	56032	$41.00	Max: Min: 0 Step: 1 Add
9⁄32″	No range*	ER-16	Sealed	56034	$41.00	Max: Min: 0 Step: 1 Add
5⁄16″	No range*	ER-16	Sealed	56036	$41.00	Max: Min: 0 Step: 1 Add
11⁄32″	No range*	ER-16	Sealed	56038	$41.00	Max: Min: 0 Step: 1 Add
3⁄8″	No range*	ER-16	Sealed	56040	$41.00	Max: Min: 0 Step: 1 Add
13⁄32″	No range*	ER-16	Sealed	56042	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-16 Ultra-Precision Sealed ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
3mm	No range*	ER-16	Sealed	56434	$41.00	Max: Min: 0 Step: 1 Add
4mm	No range*	ER-16	Sealed	56436	$41.00	Max: Min: 0 Step: 1 Add
5mm	No range*	ER-16	Sealed	56438	$41.00	Max: Min: 0 Step: 1 Add
6mm	No range*	ER-16	Sealed	56440	$41.00	Max: Min: 0 Step: 1 Add
7mm	No range*	ER-16	Sealed	56442	$41.00	Max: Min: 0 Step: 1 Add
8mm	No range*	ER-16	Sealed	56444	$41.00	Max: Min: 0 Step: 1 Add
9mm	No range*	ER-16	Sealed	56446	$41.00	Max: Min: 0 Step: 1 Add
10mm	No range*	ER-16	Sealed	56448	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-16 Ultra-Precision Collet Sets

COLLET SERIES	ER COLLET TYPE	RANGE	NUMBER OF COLLETS IN SET	PART NUMBER	PRICE
ER-16	Standard	1⁄16″ - 3⁄8″ x 32nds	11	53302	$407.00	Max: Min: 0 Step: 1 Add
ER-16	Sealed	No range*	9	56302	$369.00	Max: Min: 0 Step: 1 Add
ER-16	Standard	1 - 10mm x 1mm	10	53702	$370.00	Max: Min: 0 Step: 1 Add
ER-16	Sealed	No range*	8	56702	$328.00	Max: Min: 0 Step: 1 Add

Royal ER-20 Ultra-Precision Standard ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄16″	0.062″–0.043″	ER-20	Standard	53050	$41.00	Max: Min: 0 Step: 1 Add
3⁄32″	0.093″–0.054″	ER-20	Standard	53052	$41.00	Max: Min: 0 Step: 1 Add
1⁄8″	0.125″–0.086″	ER-20	Standard	53054	$41.00	Max: Min: 0 Step: 1 Add
5⁄32″	0.156″–0.117″	ER-20	Standard	53056	$41.00	Max: Min: 0 Step: 1 Add
3⁄16″	0.187″–0.148″	ER-20	Standard	53058	$41.00	Max: Min: 0 Step: 1 Add
7⁄32″	0.218″–0.179″	ER-20	Standard	53060	$41.00	Max: Min: 0 Step: 1 Add
1⁄4″	0.250″–0.211″	ER-20	Standard	53062	$41.00	Max: Min: 0 Step: 1 Add
9⁄32″	0.281″–0.242″	ER-20	Standard	53064	$41.00	Max: Min: 0 Step: 1 Add
5⁄16″	0.312″–0.273″	ER-20	Standard	53066	$41.00	Max: Min: 0 Step: 1 Add
11⁄32″	0.343″–0.304″	ER-20	Standard	53068	$41.00	Max: Min: 0 Step: 1 Add
3⁄8″	0.375″–0.336″	ER-20	Standard	53070	$41.00	Max: Min: 0 Step: 1 Add
13⁄32″	0.406″–0.367″	ER-20	Standard	53072	$41.00	Max: Min: 0 Step: 1 Add
7⁄16″	0.437″–0.398″	ER-20	Standard	53074	$41.00	Max: Min: 0 Step: 1 Add
15⁄32″	0.468″–0.429″	ER-20	Standard	53076	$41.00	Max: Min: 0 Step: 1 Add
1⁄2″	0.500″–0.461″	ER-20	Standard	53078	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-20 Ultra-Precision Standard ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
2mm	2mm - 1mm	ER-20	Standard	53460	$41.00	Max: Min: 0 Step: 1 Add
3mm	3mm - 2mm	ER-20	Standard	53462	$41.00	Max: Min: 0 Step: 1 Add
4mm	4mm - 3mm	ER-20	Standard	53464	$41.00	Max: Min: 0 Step: 1 Add
5mm	5mm - 4mm	ER-20	Standard	53466	$41.00	Max: Min: 0 Step: 1 Add
6mm	6mm - 5mm	ER-20	Standard	53468	$41.00	Max: Min: 0 Step: 1 Add
7mm	7mm - 6mm	ER-20	Standard	53470	$41.00	Max: Min: 0 Step: 1 Add
8mm	8mm - 7mm	ER-20	Standard	53472	$41.00	Max: Min: 0 Step: 1 Add
9mm	9mm - 8mm	ER-20	Standard	53474	$41.00	Max: Min: 0 Step: 1 Add
10mm	10mm - 9mm	ER-20	Standard	53476	$41.00	Max: Min: 0 Step: 1 Add
11mm	11mm - 10mm	ER-20	Standard	53478	$41.00	Max: Min: 0 Step: 1 Add
12mm	12mm - 11mm	ER-20	Standard	53480	$41.00	Max: Min: 0 Step: 1 Add
13mm	13mm - 12mm	ER-20	Standard	53482	$41.00	Max: Min: 0 Step: 1 Add

Royal ER-20 Ultra-Precision Sealed ER Collets (Inch)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
1⁄8″	No range*	ER-20	Sealed	56054	$48.00	Max: Min: 0 Step: 1 Add
5⁄32″	No range*	ER-20	Sealed	56056	$48.00	Max: Min: 0 Step: 1 Add
3⁄16″	No range*	ER-20	Sealed	56058	$48.00	Max: Min: 0 Step: 1 Add
7⁄32″	No range*	ER-20	Sealed	56060	$48.00	Max: Min: 0 Step: 1 Add
1⁄4″	No range*	ER-20	Sealed	56062	$48.00	Max: Min: 0 Step: 1 Add
9⁄32″	No range*	ER-20	Sealed	56064	$48.00	Max: Min: 0 Step: 1 Add
5⁄16″	No range*	ER-20	Sealed	56066	$48.00	Max: Min: 0 Step: 1 Add
11⁄32″	No range*	ER-20	Sealed	56068	$48.00	Max: Min: 0 Step: 1 Add
3⁄8″	No range*	ER-20	Sealed	56070	$48.00	Max: Min: 0 Step: 1 Add
13⁄32″	No range*	ER-20	Sealed	56072	$48.00	Max: Min: 0 Step: 1 Add
7⁄16″	No range*	ER-20	Sealed	56074	$48.00	Max: Min: 0 Step: 1 Add
15⁄32″	No range*	ER-20	Sealed	56076	$48.00	Max: Min: 0 Step: 1 Add
1⁄2″	No range*	ER-20	Sealed	56078	$48.00	Max: Min: 0 Step: 1 Add

Royal ER-20 Ultra-Precision Sealed ER Collets (Metric)

DRILL/ENDMILL DIAMETER	STANDARD COLLET GRIP RANGE	COLLET SERIES	ER COLLET TYPE	PART NUMBER	PRICE
3mm	No range*	ER-20	Sealed	56462	$48.00	Max: Min: 0 Step: 1 Add
4mm	No range*	ER-20	Sealed	56464	$48.00	Max: Min: 0 Step: 1 Add
5mm	No range*	ER-20	Sealed	56466	$48.00	Max: Min: 0 Step: 1 Add
6mm	No range*	ER-20	Sealed	56468	$48.00	Max: Min: 0 Step: 1 Add
7mm	No range*	ER-20	Sealed	56470	$48.00	Max: Min: 0 Step: 1 Add
8mm	No range*	ER-20	Sealed	56472	$48.00	Max: Min: 0 Step: 1 Add
9mm	No range*	ER-20	Sealed	56474	$48.00	Max: Min: 0 Step: 1 Add
10mm	No range*	ER-20	Sealed	56476	$48.00	Max: Min: 0 Step: 1 Add
11mm	No range*	ER-20	Sealed	56478	$48.00	Max: Min: 0 Step: 1 Add
12mm	No range*	ER-20	Sealed	56480	$48.00	Max: Min: 0 Step: 1 Add
13mm	No range*	ER-20	Sealed	56482	$48.00	Max: Min: 0 Step: 1 Add

Royal ER-20 Ultra-Precision Collet Sets

COLLET SERIES	ER COLLET TYPE	RANGE	NUMBER OF COLLETS IN SET	PART NUMBER	PRICE
ER-20	Standard	5⁄32″ - 1⁄2″ x 32nds	12	53304	$492.00	Max: Min: 0 Step: 1 Add
ER-20	Sealed	No range*	12	56304	$576.00	Max: Min: 0 Step: 1 Add
ER-20	Standard	2 - 13mm x 1mm	12	53704	$492.00	Max: Min: 0 Step: 1 Add
ER-20	Sealed	No range*	11	56704	$528.00	Max: Min: 0 Step: 1 Add