Carr Lock® Clamps

Carr Lock System

Product Information

The Carr Lock® System allows accurately locating and clamping at the same time, with just the turn of a hex wrench. Ideal for mounting quick-change tooling on a subplate. Each mounting point consists of three components: (1) a Carr Lock® Clamp, with a precisely ground shank; (2) a Carr Lock® Liner Bushing or clearance hole in the top plate; (3) a Carr Lock® Receiver Bushing in the subplate. This compact assembly provides considerable holddown force, together with an incredible +/-.0005" repeatability. Made in USA.

Available in the following shank diameters, each in a choice of lengths for different top plate thicknesses (both inch and metric):

13mm

16mm

20mm

25mm

30mm

35mm

50mm

Application Information

Each mounting point consists of three components:

(1) Carr Lock® Clamp, with a precisely ground shank

(2) Carr Lock® Liner Bushing or clearance hole in the top plate

(3) Carr Lock® Receiver Bushing in the subplate

Extra-thick top plates can be counterbored to achieve proper clamping thickness (hold thickness to ±.005").

Videos

Carr Lock® System

Carr Lock® System

Carr Lock® Clamping System Overview With a CNC Machinist

Go lean with the Carr Lock® System & change from job to job in seconds. Carr Lane CNC Production Supervisor Nick Burton discusses the Carr Lock® System

Operation

Turning the clamping screw with a hex wrench advances the large center ball, pushing the three clamping balls outward. These balls engage the angled ID section of the Receiver Bushing, pulling the clamp firmly downward. Clamps with 16mm and 20mm shank diameter are optionally available with a Knurled Head Screw for actuation.

Design Considerations & Safety Precautions

Carr Lock® Clamps should only be used to locate and clamp flat plates on machine tools. Each top plate should have one Carr Lock® mount designated as its primary reference point, and one as its secondary reference point. These two mounts should be as far apart as possible. The secondary reference point should have a relieved liner to avoid redundant location (binding). Additional Carr Lock® Clamps can be used for more clamping force, but these should be installed in clearance holes, not locating liners. Note that the same Carr Lock® Clamp fits into any type of liner or a clearance hole. Carr Lock® Clamps must be used with Carr Lock® Receiver Bushings for proper operation. Plate thickness must be +/-.005" to achieve full clamping force. Do not exceed maximum screw torque shown.

Optional Knurled-Head Screw

Carr Lock Clamps with 16 and 20mm shank diameters are optionally available with a Knurled-Head Screw for tightening without a wrench.

Material

ITEM	MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
Clamp Body	4340 Steel	heat treated Rc 40-45	-	✔	✔
Balls	440C Stainless	-	-	✔	✔
Clamping Screw	Carbon Steel	-	Black Oxide	✔	✔
O-Ring	Viton	-	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Carr Lock® Clamps

Carr Lock® Clamp (Inch)

PART NO.	A SHANK DIA NOMINAL	A SHANK DIA ACTUAL	B PLATE THICKNESS	C	D DIA	E	F	G	MAX SCREW TORQUE (ft-lbs)	MAX HOLD- DOWN FORCE (lbs)
CL-13-CLC-0.50	13mm	.5116 / .5111	.50	.75	7/8	1/4	1.08	3/32	1	750
CL-13-CLC-0.75	13mm	.5116 / .5111	.75	.75	7/8	1/4	1.33	3/32	1	750
CL-16-CLC-0.50	16mm	.6297 / .6292	.50	.75	1-1/2	5/16	1.15	1/8	2	1200
CL-16-CLC-0.75	16mm	.6297 / .6292	.75	.75	1-1/2	5/16	1.40	1/8	2	1200
CL-20-CLC-0.75	20mm	7872 / .7867	.75	.83	1-3/4	3/8	1.53	1/8	3	3000
CL-20-CLC-1.00	20mm	7872 / .7867	1.00	.83	1-3/4	3/8	1.78	1/8	3	3000
CL-25-CLC-0.75	25mm	.9841 / .9836	.75	1.00	2	3/8	1.70	5/32	7	7000
CL-25-CLC-1.00	25mm	.9841 / .9836	1.00	1.00	2	3/8	1.95	5/32	7	7000
CL-30-CLC-0.75	30mm	1.1809 / 1.1804	.75	1.23	2-1/4	1/2	1.88	3/16	12	10000
CL-30-CLC-1.00	30mm	1.1809 / 1.1804	1.00	1.23	2-1/4	1/2	2.13	3/16	12	10000
CL-35-CLC-0.75	35mm	1.3778 / 1.3773	.75	1.28	2-1/4	1/2	1.97	1/4	19	15500
CL-35-CLC-1.00	35mm	1.3778 / 1.3773	1.00	1.28	2-1/4	1/2	2.22	1/4	19	15500
CL-35-CLC-1.50	35mm	1.3778 / 1.3773	1.50	1.28	2-1/4	1/2	2.72	1/4	19	15500
CL-35-CLC-2.00	35mm	1.3778 / 1.3773	2.00	1.28	2-1/4	1/2	3.22	1/4	19	15500
CL-50-CLC-1.00	50mm	1.9683 / 1.9678	1.00	1.80	3	3/4	2.70	3/8	38	20000
CL-50-CLC-1.50	50mm	1.9683 / 1.9678	1.50	1.80	3	3/4	3.20	3/8	38	20000
CL-50-CLC-2.00	50mm	1.9683 / 1.9678	2.00	1.80	3	3/4	3.70	3/8	38	20000

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Carr Lock® Clamp (Metric)

PART NO.	A SHANK DIA NOMINAL (mm)	A SHANK DIA ACTUAL (mm)	B PLATE THICKNESS (mm)	C (mm)	D DIA (mm)	E (mm)	F (mm)	G (mm)	MAX SCREW TORQUE (Nm)	MAX HOLD- DOWN FORCE (kN)
CLM-13-CLC-13	13	12.995 / 12.982	13	20	22	6	28	2.5	1.4	3.3
CLM-13-CLC-20	13	12.995 / 12.982	20	20	22	6	34.5	2.5	1.4	3.3
CLM-16-CLC-20	16	15.995 / 15.982	20	20	38	8	36.5	3	2.7	5.3
CLM-16-CLC-25	16	15.995 / 15.982	25	20	38	8	41.5	3	2.7	5.3
CLM-20-CLC-20	20	19.995 / 19.982	20	22	45	10	39.5	3	4.1	13
CLM-20-CLC-25	20	19.995 / 19.982	25	22	45	10	44.5	3	4.1	13
CLM-25-CLC-20	25	24.995 / 24.982	20	26	50	10	44	4	9.5	31
CLM-25-CLC-25	25	24.995 / 24.982	25	26	50	10	49	4	9.5	31

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Carr Lock® Clamp with Knurled-Head Screw (Inch)

PART NO.	A SHANK DIA NOMINAL	A SHANK DIA ACTUAL	B PLATE THICKNESS	C	D DIA	E	F	G	MAX SCREW TORQUE (ft-lbs)	MAX HOLD- DOWN FORCE (lbs)
CL-13-CLCK-0.50	13mm	.5116 / .5111	.50	.75	7/8	1/4	1.08	3/32	1	750
CL-13-CLCK-0.75	13mm	.5116 / .5111	.75	.75	7/8	1/4	1.33	3/32	1	750
CL-16-CLCK-0.50	16mm	.6297 / .6292	.50	.75	1-1/2	5/16	1.14	1/8	2	1200
CL-16-CLCK-0.75	16mm	.6297 / .6292	.75	.75	1-1/2	5/16	1.40	1/8	2	1200
CL-20-CLCK-0.75	20mm	7872 / .7867	.75	.83	1-3/4	3/8	1.53	1/8	3	3000
CL-20-CLCK-1.00	20mm	7872 / .7867	1.00	.83	1-3/4	3/8	1.78	1/8	3	3000
CL-25-CLCK-0.75	25mm	.9841 / .9836	.75	1.00	2	3/8	1.70	5/32	7	7000
CL-25-CLCK-1.00	25mm	.9841 / .9836	1.00	1.00	2	3/8	1.95	5/32	7	7000

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Carr Lock® Clamp with Knurled-Head Screw (Metric)

PART NO.	A SHANK DIA NOMINAL (mm)	A SHANK DIA ACTUAL (mm)	B PLATE THICKNESS (mm)	C (mm)	D DIA	E (mm)	F (mm)	G (mm)	MAX SCREW TORQUE (Nm)	MAX HOLD- DOWN FORCE (kN)
CLM-13-CLCK-13	13	12.995 / 12.982	13	20	22	6	28	2.5	1.4	3.3
CLM-13-CLCK-20	13	12.995 / 12.982	20	20	22	6	34.5	2.5	1.4	3.3
CLM-16-CLCK-20	16	15.995 / 15.982	20	20	38	8	36.5	3	2.7	5.3
CLM-16-CLCK-25	16	15.995 / 15.982	25	20	38	8	41.5	3	2.7	5.3
CLM-20-CLCK-20	20	9.995 / 19.982	20	22	45	10	39.5	3	4.1	13
CLM-20-CLCK-25	20	9.995 / 19.982	25	22	45	10	44.5	3	4.1	13
CLM-25-CLCK-20	25	24.995 / 24.982	20	26	50	10	44	4	9.5	31
CLM-25-CLCK-25	25	24.995 / 24.982	25	26	50	10	49	4	9.5	31

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Replacement Part Kit (Inch)
Replacement Part Kit includes screw, center ball, locking balls, and O-ring.

PART NO.	FOR CLAMP	A SHANK DIA	B PLATE THICKNESS
CL-13-CLPK-0.50	CL-13-CLC-0.50	13mm	.50
CL-13-CLPK-0.75	CL-13-CLC-0.75	13mm	.75
CL-16-CLPK-0.50	CL-16-CLC-0.50	16mm	.50
CL-16-CLPK-0.75	CL-16-CLC-0.75	16mm	.75
CL-20-CLPK-0.75	CL-20-CLC-0.75	20mm	.75
CL-20-CLPK-1.00	CL-20-CLC-1.00	20mm	1.00
CL-25-CLPK-0.75	CL-25-CLC-0.75	25mm	.75
CL-25-CLPK-1.00	CL-25-CLC-1.00	25mm	1.00
CL-30-CLPK-0.75	CL-30-CLC-0.75	30mm	.75
CL-30-CLPK-1.00	CL-30-CLC-1.00	30mm	1.00
CL-35-CLPK-0.75	CL-35-CLC-0.75	35mm	.75
CL-35-CLPK-1.00	CL-35-CLC-1.00	35mm	1.00
CL-35-CLPK-1.50	CL-35-CLC-1.50	35mm	1.50
CL-35-CLPK-2.00	CL-35-CLC-2.00	35mm	2.00
CL-50-CLPK-1.00	CL-50-CLC-1.00	50mm	1.00
CL-50-CLPK-1.50	CL-50-CLC-1.50	50mm	1.50
CL-50-CLPK-2.00	CL-50-CLC-2.00	50mm	2.00

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Replacement Part Kit (Metric)
Replacement Part Kit includes screw, center ball, locking balls, and O-ring.

PART NO.	FOR CLAMP	A SHANK DIA NOMINAL (mm)	B PLATE THICKNESS (mm)
CLM-13-CLPK-13	CLM-13-CLC-13	13	13
CLM-13-CLPK-20	CLM-13-CLC-20	13	20
CLM-16-CLPK-20	CLM-16-CLC-20	16	20
CLM-16-CLPK-25	CLM-16-CLC-25	16	25
CLM-20-CLPK-20	CLM-20-CLC-20	20	20
CLM-20-CLPK-25	CLM-20-CLC-25	20	25
CLM-25-CLPK-20	CLM-25-CLC-20	25	20
CLM-25-CLPK-25	CLM-25-CLC-25	25	25

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Measurement

Material

Finish

Products

Language

Carr Lock® Clamps

Product Information

Application Information

Videos

Operation

Design Considerations & Safety Precautions

Optional Knurled-Head Screw

Material

Carr Lock® Clamps

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