Part includes Lock Nut & Back-Up Screw (where applicable).
Product Description
Straight Shank Collet Chucks
Short “Stubby” ER Collet Holders 3.5″ – 6.2″ 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 |
| SPH-ER11-0500 | 0.500 | 3.50 | 0.47 | 0.62 | 9/16″ | 1/4″ | ER11 | .019 – .276 | W-0562 | LN-ER11 |
| SPH-ER11-0625 | 0.625 | 3.50 | 0.47 | 0.62 | 9/16″ | 1/4″ | ER11 | .019 – .276 | W-0562 | LN-ER11 |
| SPH-ER16-0625 | 0.625 | 3.65 | 0.68 | 0.86 | 13/16″ | 3/8″ | ER16 | .019 – .394 | W-0812 | LN-ER16 |
| SPH-ER16-0750 | 0.750 | 3.65 | 0.68 | 0.86 | 13/16″ | 3/8″ | ER16 | .019 – .394 | W-0812 | LN-ER16 |
| SPH-ER20-0625 | 0.625 | 3.75 | 0.78 | 1.10 | 1″ | 3/8″ | ER20 | .039 – .512 | W-1000 | LN-ER20 |
| SPH-ER20-0750 | 0.750 | 3.75 | 0.78 | 1.10 | 1″ | 3/8″ | ER20 | .039 – .512 | W-1000 | LN-ER20 |
| SPH-ER20-1000 | 1.000 | 3.75 | 0.78 | 1.10 | 1″ | 9/16″ | ER20 | .039 – .512 | W-1000 | LN-ER20 |
| SPH-ER25-1000 | 1.000 | 6.10 | 0.84 | 1.36 | 1-1/4″ | 3/4″ | ER25 | .039 – .630 | W-1250 | LN-ER25 |
| SPH-ER25-1250 | 1.250 | 6.10 | 0.84 | 1.36 | 1-1/4″ | 3/4″ | ER25 | .039 – .630 | W-1250 | LN-ER25 |
| SPH-ER32-1000 | 1.000 | 6.20 | 0.95 | 1.61 | 1-1/2″ | 9/16″ | ER32 | .039 – .787 | W-1500 | LN-ER32 |
| SPH-ER32-1250 | 1.250 | 6.20 | 0.95 | 1.61 | 1-1/2″ | 3/4″ | ER32 | .039 – .787 | W-1500 | LN-ER32 |
| SPH-ER32-1500 | 1.500 | 6.20 | 0.95 | 1.61 | 1-1/2″ | 3/4″ | ER32 | .039 – .787 | W-1500 | LN-ER32 |
Images to the right (second image in Product Gallery below main image)
All back-up screws have 1/8″ hex. socket
DO NOT OVER TIGHTEN LOCK NUT, ALWAYS USE BACKUP SCREW
Assembly Instructions
Add To Cart
$69.00 – $145.00
Product Images
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