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Serrated Press-Fit Bushings (SP)

Drill Bushings

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Serrated Press-Fit Bushings (SP)

SP bushings are similar to P bushings, but with top serrations to prevent rotation in soft materials. SP bushings are recommended in high-torque situations for materials such as magnesium, aluminum, masonite, or wood. Serrations also resist axial force to prevent pushing the bushing through the jig plate. The finish-ground OD below the serrations ensures accurate ID location.

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:

SP-20-12-.1250 1/8" ID (.1250)

SP-20-12-.1772 4.50mm ID (.1772)

Technical Information

Click here for Standard Drill Sizes

Application Information

SP bushings have top serrations to prevent rotation in softer materials, such as magnesium, aluminum, masonite, or wood. Finish-ground OD ensures accurate ID location.

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:

SP-20-12-.1250-REAMER (Special)

OD Tolerance

Standard OD Tolerance:

13/64 to 1" 0/-.0002

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:

SP-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

Serrated Press-Fit Bushings (SP)

SP 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: SP-13-4-.0520 (SP-13-4 with .0520" ID)

13/64" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	SP-13-4	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	1/4
	SP-13-5	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	5/16
	SP-13-6	.0520-.0995	1/16-3/32, #55-#39, 1.35-2.50mm	13/64	3/8
	SP-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
	SP-16-4	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	1/4
	SP-16-5	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	5/16
	SP-16-6	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	3/8
	SP-16-8	.0980-.1406	7/64-9/64, #40-#28, 2.50-3.50mm	1/4	1/2

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5/16" OD

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

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13/32" OD

QUANTITY	BASIC PART NO.	AVAILABLE ID SIZES	STANDARD DRILL SIZES	OD	LENGTH
	SP-26-5	.1562-.2570	5/32-1/4, #22-F, 4.00-6.50mm	13/32	5/16
	SP-26-6	.1562-.2570	5/32-1/4, #22-F, 4.00-6.50mm	13/32	3/8
	SP-26-8	.1562-.2570	5/32-1/4, #22-F, 4.00-6.50mm	13/32	1/2
	SP-26-12	.1562-.2570	5/32-1/4, #22-F, 4.00-6.50mm	13/32	3/4
	SP-26-16	.1562-.2570*	5/32-1/4, #22-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
	SP-32-5	.1562-.3160	5/32-5/16, #22-O, 4.00-8.00mm	1/2	5/16
	SP-32-6	.1562-.3160	5/32-5/16, #22-O, 4.00-8.00mm	1/2	3/8
	SP-32-8	.1562-.3160	5/32-5/16, #22-O, 4.00-8.00mm	1/2	1/2
	SP-32-12	.1562-.3160	5/32-5/16, #22-O, 4.00-8.00mm	1/2	3/4
	SP-32-16	.1562-.3160*	5/32-5/16, #22-O, 4.00-8.00mm	1/2	1

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5/8" OD

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

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3/4" OD

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

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7/8" OD

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

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1" OD

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

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