Product Description

Part includes Lock Nut & Back-Up Screw (where applicable).

Straight Shank Collet Chucks
Long ER Collet Holders 6.8″ – 16″ OAL

Replacement Lock Nuts &
Open-end hex wrenches
are also available
(Part Numbers In Table Below)

For use on CNC Mills

Manufactured in USA from high grade, heat-treated alloy steel
Black Oxide finish for corrosion prevention
Comes equipped with inside back-up screw and Lock Nut
Tighten lock nut with a standard open-end wrench
(no special wrench needed, unlike other brands)
Smaller diameter lock nut than most brands make
these ideal for machining hard-to-reach surfaces.

ER lock nuts interchangeable with ER “mini” lock nuts of other manufacturers.

Rovi

Table Of Dimensions

Chuck Part Number	D Shank Diameter	L Overall Length	L1 Lock Nut Length	D1 Lock Nut Diameter	Hex. Wrench Size	Max. Dia. Thru Shank	ER Collet Series	Chuck Capacity	Wrench Part Number	Lock Nut Part Number
PCH-ER11-0500S-8L	0.500″	8″	0.47″	0.62″	9/16″	Solid	ER11	.019 – .276	W-0562	LN-ER11
PCH-ER11-0500S-9L	0.500″	9″	0.47″	0.62″	9/16″	Solid	ER11	.019 – .276	W-0562	LN-ER11
PCH-ER16-0750CH-10L	0.750″	10″	0.68″	0.86″	13/16″	Coolant Hole	ER16	.019 – .394	W-0812	LN-ER16
PCH-ER16-0750CH-14L	0.750″	14″	0.68″	0.86″	13/16″	Coolant Hole	ER16	.019 – .394	W-0812	LN-ER16
PCH-ER20-1000S-10L	1.000″	10″	0.78″	1.10″	1″	Solid	ER20	.039 – .512	W-1000	LN-ER20
PCH-ER20-1000CH-12L	1.000″	12.50″	0.78″	1.10″	1″	Coolant Hole	ER20	.039 – .512	W-1000	LN-ER20
PCH-ER20-1000S-14L	1.000″	14″	0.78″	1.10″	1″	Solid	ER20	.039-.512	W-1000	LN-ER20
PCH-ER20-1000CH-16L	1.000″	16″	0.78″	1.10″	1″	Coolant Hole	ER20	.039-.512	W-1000	LN-ER20
PCH-ER25-1250 **	1.250″	7.25″	0.84″	1.36″	1-1/4″	3/4″	ER25	.039 – .630	W-1250	LN-ER25

** Image to the right
* Solid Shank items have no thru-hole or backup screw

All back-up screws have 1/8″ hex. socket
Extra-long chucks (8″+) are limited supply. Please check availability before ordering
DO NOT OVER TIGHTEN LOCK NUT, ALWAYS USE BACKUP SCREW