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Directed-Coolant Head Liner Bushings (DCHL)

Drill Bushings

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Product Information

Directed-Coolant Head Liner Bushings (DCHL)

These special head liners are required for Directed-Coolant Bushings, to direct coolant from a drilled manifold passage to the holes in the bushing's OD wall. Important: always order the liner length listed in the table, for proper hole alignment. DC bushings must be the same length as their liners, while DCCH bushings must extend beyond their liners to the next standard length.

Complete part numbers for all standard Directed-Coolant Liner bushings are listed in the tables below.

Application Information

These special head liners route coolant from a drilled manifold passage to the holes in a Directed-Coolant Bushing's OD wall.

ID Tolerance

Standard Liner ID Tolerance:

5/16" +.0001/+.0004

1/2" +.0002/+.0005

3/4" +.0003/+.0006

1" +.0004/+.0007

1-3/8" +.0006/+.0010

1-3/4" +.0008/+.0012

2-1/4" +.0010/+.0015

OD Tolerance

Standard OD Tolerance:

1/2" +.0017/+.0014

3/4 to 1" +.0018/+.0015

1-1/4" +.0020/+.0017

1-3/8" +.0022/+.0018

1-3/4" +.0023/+.0019

2-1/4 to 2-3/4" +.0025/+.0021

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

Directed-Coolant Head Liner Bushings (DCHL)

QUANTITY	LINER PART NO.	ID	OD	LENGTH	PRICE	MATCHING DC BUSHING	MATCHING DCCH BUSHING	P	Q	T DIA	U DIA	V
	DCHL-32-8	5/16	1/2	1/2	13.97	—	DCCH-20-12	3/32	3/16	.067	25/64	5/32
	DCHL-32-12	5/16	1/2	3/4	14.75	DC-20-12	DCCH-20-16	3/32	3/16	.067	25/64	5/32
	DCHL-32-16	5/16	1/2	1	17.84	DC-20-16	DCCH-20-22	3/32	3/16	.067	25/64	5/32
	DCHL-32-22	5/16	1/2	1-3/8	20.87	DC-20-22	—	3/32	3/16	.067	25/64	5/32
	DCHL-48-8	1/2	3/4	1/2	13.97	—	DCCH-32-12	3/32	3/16	.093	39/64	5/32
	DCHL-48-12	1/2	3/4	3/4	14.75	DC-32-12	DCCH-32-16	3/32	3/16	.093	39/64	5/32
	DCHL-48-16	1/2	3/4	1	16.26	DC-32-16	DCCH-32-22	3/32	3/16	.093	39/64	5/32
	DCHL-48-22	1/2	3/4	1-3/8	18.20	DC-32-22	DCCH-32-28	3/32	3/16	.093	39/64	5/32
	DCHL-48-28	1/2	3/4	1-3/4	20.44	DC-32-28	DCCH-32-34	3/32	3/16	.093	39/64	5/32
	DCHL-48-34	1/2	3/4	2-1/8	23.02	DC-32-34	—	3/32	3/16	.093	39/64	5/32
	DCHL-64-12	3/4	1	3/4	16.70	—	DCCH-48-16	1/8	5/16	.104	55/64	7/32
	DCHL-64-16	3/4	1	1	17.41	DC-48-16	DCCH-48-22	1/8	5/16	.104	55/64	7/32
	DCHL-64-22	3/4	1	1-3/8	18.20	DC-48-22	DCCH-48-28	1/8	5/16	.104	55/64	7/32
	DCHL-64-28	3/4	1	1-3/4	21.65	DC-48-28	DCCH-48-34	1/8	5/16	.104	55/64	7/32
	DCHL-64-34	3/4	1	2-1/8	22.39	DC-48-34	DCCH-48-40	1/8	5/16	.104	55/64	7/32
	DCHL-64-40	3/4	1	2-1/2	25.76	DC-48-40	—	1/8	5/16	.104	55/64	7/32
	DCHL-88-12	1	1-3/8	3/4	18.20	—	DCCH-64-16	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-16	1	1-3/8	1	19.92	DC-64-16	DCCH-64-22	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-22	1	1-3/8	1-3/8	21.29	DC-64-22	DCCH-64-28	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-28	1	1-3/8	1-3/4	23.95	DC-64-28	DCCH-64-34	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-34	1	1-3/8	2-1/8	26.39	DC-64-34	DCCH-64-40	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-40	1	1-3/8	2-1/2	29.68	DC-64-40	DCCH-64-48	1/8	5/16	.125	1-5/32	7/32
	DCHL-88-48	1	1-3/8	3	48.43	DC-64-48	—	1/8	5/16	.125	1-5/32	7/32
	DCHL-112-12	1-3/8	1-3/4	3/4	23.38	—	DCCH-88-16	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-16	1-3/8	1-3/4	1	24.33	DC-88-16	DCCH-88-22	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-22	1-3/8	1-3/4	1-3/8	26.25	DC-88-22	DCCH-88-28	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-28	1-3/8	1-3/4	1-3/4	28.91	DC-88-28	DCCH-88-34	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-34	1-3/8	1-3/4	2-1/8	32.37	DC-88-34	DCCH-88-40	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-40	1-3/8	1-3/4	2-1/2	35.82	DC-88-40	DCCH-88-48	3/16	7/16	.147	1-17/32	9/32
	DCHL-112-48	1-3/8	1-3/4	3	55.11	DC-88-48	—	3/16	7/16	.147	1-17/32	9/32
	DCHL-144-16	1-3/4	2-1/4	1	29.26	—	DCCH-112-22	3/16	7/16	.173	1-31/32	9/32
	DCHL-144-22	1-3/4	2-1/4	1-3/8	31.77	DC-112-22	DCCH-112-28	3/16	7/16	.173	1-31/32	9/32
	DCHL-144-28	1-3/4	2-1/4	1-3/4	34.44	DC-112-28	DCCH-112-34	3/16	7/16	.173	1-31/32	9/32
	DCHL-144-34	1-3/4	2-1/4	2-1/8	37.52	DC-112-34	DCCH-112-40	3/16	7/16	.173	1-31/32	9/32
	DCHL-144-40	1-3/4	2-1/4	2-1/2	41.69	DC-112-40	DCCH-112-48	3/16	7/16	.173	1-31/32	9/32
	DCHL-144-48	1-3/4	2-1/4	3	58.94	DC-112-48	—	3/16	7/16	.173	1-31/32	9/32
	DCHL-176-16	2-1/4	2-3/4	1	34.08	—	DCCH-144-22	3/16	7/16	.173	2-15/32	9/32
	DCHL-176-22	2-1/4	2-3/4	1-3/8	37.52	DC-144-22	DCCH-144-28	3/16	7/16	.173	2-15/32	9/32
	DCHL-176-28	2-1/4	2-3/4	1-3/4	41.33	DC-144-28	DCCH-144-34	3/16	7/16	.173	2-15/32	9/32
	DCHL-176-34	2-1/4	2-3/4	2-1/8	44.84	DC-144-34	DCCH-144-40	3/16	7/16	.173	2-15/32	9/32
	DCHL-176-40	2-1/4	2-3/4	2-1/2	49.37	DC-144-40	DCCH-144-48	3/16	7/16	.173	2-15/32	9/32
	DCHL-176-48	2-1/4	2-3/4	3	65.45	DC-144-48	—	3/16	7/16	.173	2-15/32	9/32

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