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Diamond-Groove Bushings (DG)

Drill Bushings

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Diamond-Groove Bushings (DG)

Diamond-Groove Bushings are designed for cast-in-place or potted installation. The diamond-knurled OD provides excellent holding strength against both rotational and axial forces. Since the bushing's OD is not ground, the ID must be accurately located during casting or potting to ensure accuracy in the finished tool.

To order a specific standard bushing, select the basic part number below and add the desired ID drill size (as a 4-place decimal inch) on the Price & Availability screen. See Technical Information tab for Standard Drill Sizes. Standard prices apply only to bushings with a standard inch, number, letter, or metric ID size within the stated range. Long bushings with ID sizes marked * are counterbored according to ANSI standards for proper drill-bearing length.

Example standard bushings:

DG-26-16-.1875 3/16" ID (.1875)

DG-26-16-.1772 4.50mm ID (.1772)

Technical Information

Click here for Standard Drill Sizes

Application Information

DG Bushings are designed for cast-in-place or potted installation. Diamond-knurled OD provides excellent holding strength against both rotational and axial forces.

ID Tolerance

Standard ID Tolerance:

From #80 to 1/4" +.0001/+.0004

Over 1/4 to 3/4" +.0001/+.0005

Over 3/4 to 1-1/2" +.0002/+.0006

Over 1-1/2 to 2-3/4" +.0003/+.0007

Reamer ID Tolerance (Special):

From #80 to 1/4" +.0005/+.0008

Over 1/4 to 3/4" +.0006/+.0010

Over 3/4 to 1-1/2" +.0008/+.0012

Reamer bushings have a different ID-tolerance range than drill bushings. To special-order bushings with the reamer ID tolerance shown here, add "-REAMER" to the part number:

DG-26-16-.1875-REAMER (Special)

OD Tolerance

Standard OD Tolerance:

13/64" +.020/+.010

1/4 to 7/8" +.025/+.010

1" +.035/+.010

No-Counterbore Option on Long Bushings*

Extremely long bushings with a small ID size (marked with an asterisk * in the tables below) are counterbored according to ANSI standards for proper drill-bearing length to eliminate binding and heat buildup. Add "-NCB" for applications that require these bushings without a counterbore:

DG-26-16-.1875-NCB (Special)

Material

MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
1144 Stressproof Steel	heat treated to achieve Rc 62-64 ID hardness	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Other materials are available by special order

Diamond-Groove Bushings (DG)

DG bushings with a standard ID drill size can be ordered online. To order a specific standard bushing, select the basic part number below and add the desired ID size (as a 4-place decimal inch) on the Price & Availability screen. Example: DG-13-4-.0520 (DG-13-4 with .0520" ID)

13/64" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	DG-13-4	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	1/4
	DG-13-5	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	5/16
	DG-13-6	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	3/8
	DG-13-8	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	1/2

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1/4" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	DG-16-4	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	1/4
	DG-16-5	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	5/16
	DG-16-6	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	3/8
	DG-16-8	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	1/2
	DG-16-12	.0980-.1406*	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	3/4

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5/16" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	DG-20-4	.1250-.1935	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	1/4
	DG-20-5	.1250-.1935	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	5/16
	DG-20-6	.1250-.1935	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	3/8
	DG-20-8	.1250-.1935	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	1/2
	DG-20-12	.1250-.1935	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	3/4
	DG-20-16	.1250-.1935*	1/8-3/16, #30-#10, 3.20-4.90mm	5/16	1

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13/32" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	DG-26-4	.1562-.2570	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	1/4
	DG-26-5	.1562-.2570	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	5/16
	DG-26-6	.1562-.2570	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	3/8
	DG-26-8	.1562-.2570	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	1/2
	DG-26-12	.1562-.2570	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	3/4
	DG-26-16	.1562-.2570*	5/32-1/4, #22-#1, A-F, 4.00-6.50mm	13/32	1

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1/2" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	DG-32-5	.1562-.3160	5/32-5/16, #22-#1, A-O, 4.00-8.00mm	1/2	5/16
	DG-32-6	.1562-.3160	5/32-5/16, #22-#1, A-O, 4.00-8.00mm	1/2	3/8
	DG-32-8	.1562-.3160	5/32-5/16, #22-#1, A-O, 4.00-8.00mm	1/2	1/2
	DG-32-12	.1562-.3160	5/32-5/16, #22-#1, A-O, 4.00-8.00mm	1/2	3/4
	DG-32-16	.1562-.3160*	5/32-5/16, #22-#1, A-O, 4.00-8.00mm	1/2	1

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5/8" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES RANGE	STANDARD DRILL SIZES	OD	LENGTH
	DG-40-6	.3125-.4375	5/16-7/16, O-Z, 7.90-11.00mm	5/8	3/8
	DG-40-8	.3125-.4375	5/16-7/16, O-Z, 7.90-11.00mm	5/8	1/2
	DG-40-12	.3125-.4375	5/16-7/16, O-Z, 7.90-11.00mm	5/8	3/4
	DG-40-16	.3125-.4375	5/16-7/16, O-Z, 7.90-11.00mm	5/8	1
	DG-40-22	.3125-.4375	5/16-7/16, O-Z, 7.90-11.00mm	5/8	1-3/8

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3/4" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES RANGE	STANDARD DRILL SIZES	OD	LENGTH
	DG-48-6	.3125-.5312	5/16-17/32, O-Z, 8.00-13.00mm	3/4	3/8
	DG-48-8	.3125-.5312	5/16-17/32, O-Z, 8.00-13.00mm	3/4	1/2
	DG-48-12	.3125-.5312	5/16-17/32, O-Z, 8.00-13.00mm	3/4	3/4
	DG-48-16	.3125-.5312	5/16-17/32, O-Z, 8.00-13.00mm	3/4	1
	DG-48-22	.3125-.5312	5/16-17/32, O-Z, 8.00-13.00mm	3/4	1-3/8

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7/8" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES RANGE	STANDARD DRILL SIZES	OD	LENGTH
	DG-56-6	.5000-.6562	1/2-21/32, 13.00-16.50mm	7/8	3/8
	DG-56-8	.5000-.6562	1/2-21/32, 13.00-16.50mm	7/8	1/2
	DG-56-12	.5000-.6562	1/2-21/32, 13.00-16.50mm	7/8	3/4
	DG-56-16	.5000-.6562	1/2-21/32, 13.00-16.50mm	7/8	1
	DG-56-22	.5000-.6562	1/2-21/32, 13.00-16.50mm	7/8	1-3/8

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1" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES RANGE	STANDARD DRILL SIZES	OD	LENGTH
	DG-64-8	.5000-.7656	1/2-49/64, 13.00-19.00mm	1	1/2
	DG-64-12	.5000-.7656	1/2-49/64, 13.00-19.00mm	1	3/4
	DG-64-16	.5000-.7656	1/2-49/64, 13.00-19.00mm	1	1
	DG-64-22	.5000-.7656	1/2-49/64, 13.00-19.00mm	1	1-3/8
	DG-64-24	.5000-.7656	1/2-49/64, 13.00-19.00mm	1	1-1/2

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