Power Collet Chuck
DIN ISO 7388-1 SK40 (formerly DIN 69871)

For clamping tools with cylindrical shank in HAIMER Power Collets and ER collets according to ISO 15488.

The Power Collet Chuck is the collet chuck for the highest machining capacity in high-speed manufacturing. The optimized design with better construction combines high rigidity with vibration dampening features, giving more protection to machines, spindles and tools. The universal Power Collet Chuck is a unique high performance chuck that can also be used with standard collets.

High runout accuracy: 0.003 mm at 3 × D with HAIMER Power Collets
Also for standard collets ER according to ISO 15488 (Please note when use with standard ER collets the gage length A will vary compared to A dimension given below!)
High rigidity
Smoother running thanks to vibration absorbing geometry, therefore better surface quality and protection of tools, spindles and machines
Increased machining capacity due to higher spindle speeds, higher feed rates and larger cutting depths
Shorter processing times, higher machining accuracy, high clamping force
Equally suited to high-speed manufacturing and heavy milling
With threaded holes in order to balance with balancing screws
Optional: With Safe-Lock™ Power Collets from ER 25
Optional: Cool Jet bores on Power Collets from ER 25 Ø 6 mm

Technical data subjects to change without prior notice.

The most important features:

1. Low tendency towards vibrations by rigid shank
2. High-precision Power Collet with stabilisation and concentration trough pilot of collet
3. Fine balanced Power Collet ER nut
4. in High-precision Power Collet (optional)
5. High runout accuracy (< 3 μm)

The most important features:

1. Low tendency towards vibrations by rigid shank
2. High-precision Power Collet with stabilisation and concentration trough pilot of collet
3. Fine balanced Power Collet ER nut
4. in High-precision Power Collet (optional)
5. High runout accuracy (< 3 μm)

Safe-Lock™ pull out protection

High-precision Power Collets with stabilisation and concentration trough pilot of collet
High torque due to form closed clamping
No pull out and no spinning ot the tool
Groove on tool shank is directed so that the tool will be pulled into the chuck (depending on direction of rotation)
Safe-Lock™ starting at ER 25

Safe-Lock™ pull out protection

High-precision Power Collets with stabilisation and concentration trough pilot of collet
High torque due to form closed clamping
No pull out and no spinning ot the tool
Groove on tool shank is directed so that the tool will be pulled into the chuck (depending on direction of rotation)
Safe-Lock™ starting at ER 25