1.Works on all BT40 machines
2.Coolant thru capability
3.All critical tool holder surfaces precision ground
4.Tool Holder is Balanced to G6.3 at 15,000 rpm
5.Concentricity is less than 0.0001" at collet face
The following schematic diagrams and product pictures are only for reference.
If you have any questions, please contact us.
ER Collet Chucks are an ideal solution for most drilling and lighter higher speed milling applications producing
operational speeds as high as 15,000 RPM. The versatile design of the ER Collet Chuck provides a wide range
of machining options, from production to high precision machining. Simply select the right collet and nut
combination from our range of performance choices to achieve the best toolholder for your application.
•Works on all BT40 machines
•Collet nut is included
•Coolant thru capability
•Not threaded for internal stop screw
•All critical tool holder surfaces precision ground
•Tool Holder is Balanced to G6.3 at 15,000 rpm
•Concentricity is less than 0.0001" at collet face
•Constructed of alloy steel hardened to 56 – 60 HRC for long, durable service life
•AT3 or better accuracy standard taper specification for maximum contact with spindle.
Technical Specifications
• TIR: 0.0001" or better
• This type of tool holder is balanced to G6.3 15,000 RPM on a HAIMER Tool Dynamic Balancing System
from Germany. Balanced tool holder minimizes the centrifugal forces which minimize the stress on spindle
bearing, minimize vibration and maximize the cutting tool's life cycle and greatly improve surface finish.
• Taper ground to AT3 or better accuracy standard for maximum contact with spindle. All of Kilowood
toolholder use STOTZ Air/Electronic Gaging for production and finish inspection.
Why Buy A Balanced Toolholder?
Tool holders make the all-important connection between the cutting tool and the spindle. With the hard-earned
money you invest in cutting tools, it only makes sense to do everything possible to increase tool life. One of the
easiest ways to do this is to use balanced toolholders.
Toolholders can greatly influence the difference in tool life.
The use of a balanced toolholder can result in increased accuracy and repeatability due to less vibration and
chatter. They can help to improve spindle bearing life and improve surface finish. They can save your time by
allowing for faster speed and feed rates. All of these benefits mean that you save time and money.
Why Are They Balanced To G2.5 or G6.3?
Quite simply, this means that the toolholder balance is consistent with the spindle as recommended by
International Standards Organization (ISO) standards. Balancing to the spindle is the best of class
balanced tool holder. KILOWOOD is international Quality AT3 Class balanced V-flange toolholder
manufactured to the highest degree of technical excellence.
Condition | Brand-New | Balance Spec | G6.3 @ 15,000 rpms |
Brand | Kilowood | Material | Hardened Alloy Steel |
Taper Size | BT40 | Finish | Black Oxide |
Collet Size | ER20 | TIR | ≤0.0001" |
Product Name | ER Collet Chuck | L | 2.75"(70mm) |
Model Number |
BT40-ER20-70 (BT40-ER20-2.75) |
d | 1.38" |
SKU | Q000039444 | Net Weight | 2.56 lb |
Coolant Thru | Yes | Gross Weight | 2.80 lb |