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Head Liner Bushings – Metric (HM)

Drill Bushings

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Product Information

Head Liner Bushings – Metric (HM)

Metric Head Liner Bushings are simply specific large ID sizes of HM Head Press-Fit Bushings. Liners are permanently installed bushings used to hold renewable drill bushings. The liner's ID has a precise sliding fit with the renewable bushing's OD. The liner accurately locates the renewable bushing and protects the jig plate from wear and damage caused by frequent bushing replacement. Note: the "length" listed for an HM bushing refers to its overall length, not its length under the head.

Complete part numbers for all standard Metric Head Liner Bushings are listed in the tables below.

Application Information

Metric Head Liners are permanent bushings used to hold renewable drill bushings. The head provides resistance to axial loads, and is usually recessed in the plate.

ID Tolerance

Standard Liner ID Tolerance (G6):

From 8 to 10mm +.005/+.014mm

Over 10 to 18mm +.006/+.017mm

Over 18 to 30mm +.007/+.020mm

Over 30 to 50mm +.009/+.025mm

Over 50 to 80mm +.010/+.029mm

Over 80 and up +.012/+.034mm

OD Tolerance

Standard OD Tolerance (s6):

12 to 18mm +.039/+.028

22 to 30mm +.048/+.035

35 to 48mm +.059/+.043

55 to 62mm +.072/+.053

70 to 78mm +.078/+.059

85 to 95mm +.093/+.071

105 to 115mm +.101/+.079

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

Head Liner Bushings – Metric (HM)

QUANTITY	PART NO.	ID	OD	LENGTH	F DIA	G
	HM-12-10-8.00	8mm	12mm	10mm	15mm	3mm
	HM-12-16-8.00	8mm	12mm	16mm	15mm	3mm
	HM-15-12-10.00	10mm	15mm	12mm	18mm	3mm
	HM-15-20-10.00	10mm	15mm	20mm	18mm	3mm
	HM-15-25-10.00	10mm	15mm	25mm	18mm	3mm
	HM-18-12-12.00	12mm	18mm	12mm	22mm	4mm
	HM-18-20-12.00	12mm	18mm	20mm	22mm	4mm
	HM-18-25-12.00	12mm	18mm	25mm	22mm	4mm
	HM-22-16-15.00	15mm	22mm	16mm	26mm	4mm
	HM-22-28-15.00	15mm	22mm	28mm	26mm	4mm
	HM-22-36-15.00	15mm	22mm	36mm	26mm	4mm
	HM-26-16-18.00	18mm	26mm	16mm	30mm	4mm
	HM-26-28-18.00	18mm	26mm	28mm	30mm	4mm
	HM-26-36-18.00	18mm	26mm	36mm	30mm	4mm
	HM-30-20-22.00	22mm	30mm	20mm	34mm	5mm
	HM-30-36-22.00	22mm	30mm	36mm	34mm	5mm
	HM-30-45-22.00	22mm	30mm	45mm	34mm	5mm
	HM-35-20-26.00	26mm	35mm	20mm	39mm	5mm
	HM-35-36-26.00	26mm	35mm	36mm	39mm	5mm
	HM-35-45-26.00	26mm	35mm	45mm	39mm	5mm
	HM-42-25-30.00	30mm	42mm	25mm	46mm	5mm
	HM-42-45-30.00	30mm	42mm	45mm	46mm	5mm
	HM-42-56-30.00	30mm	42mm	56mm	46mm	5mm
	HM-48-25-35.00	35mm	48mm	25mm	52mm	5mm
	HM-48-45-35.00	35mm	48mm	45mm	52mm	5mm
	HM-48-56-35.00	35mm	48mm	56mm	52mm	5mm
	HM-55-30-42.00	42mm	55mm	30mm	59mm	5mm
	HM-55-56-42.00	42mm	55mm	56mm	59mm	5mm
	HM-55-67-42.00	42mm	55mm	67mm	59mm	5mm
	HM-62-30-48.00	48mm	62mm	30mm	66mm	6mm
	HM-62-56-48.00	48mm	62mm	56mm	66mm	6mm
	HM-62-67-48.00	48mm	62mm	67mm	66mm	6mm
	HM-70-30-55.00	55mm	70mm	30mm	74mm	6mm
	HM-70-56-55.00	55mm	70mm	56mm	74mm	6mm
	HM-70-67-55.00	55mm	70mm	67mm	74mm	6mm
	HM-78-35-62.00	62mm	78mm	35mm	82mm	6mm
	HM-78-67-62.00	62mm	78mm	67mm	82mm	6mm
	HM-78-78-62.00	62mm	78mm	78mm	82mm	6mm
	HM-85-35-70.00	70mm	85mm	35mm	90mm	6mm
	HM-85-67-70.00	70mm	85mm	67mm	90mm	6mm
	HM-85-78-70.00	70mm	85mm	78mm	90mm	6mm
	HM-95-40-78.00	78mm	95mm	40mm	100mm	6mm
	HM-95-78-78.00	78mm	95mm	78mm	100mm	6mm
	HM-95-105-78.00	78mm	95mm	105mm	100mm	6mm

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