BIG DAISHOWA Product Guide Vol 3

COLLET CHUCKS

R

Also available in N/C lathe type. See pg. 17.

CLAMPING RANGE: ø.075"-.787" For drills, reamers, taps and finishing end mills.

Clamping Range: ø.125"-.500" Exclusively for high-speed finish end milling. The advanced tapered body technology enhances rigidity to prevent chatter and deflection with precision.

The total precision of our collet, nut and body when used together shatter the common standard of ER collet chucks. Incredibly low runout will provide dramatic payback by improving machining capability & reducing production costs.

Through Tools

Jet Through

MAX 35,000 RPM

MAX 40,000 RPM

MEGA ER PERFECT SEAL For two-way coolant supply.

MEGA E PERFECT SEAL Optional sealed collet nut for coolant through tools. Remove the internal PS Ring to supply coolant to the cutting tool periphery. However, by using the standard MEGA E NUT, coolant can still be directed to the cutting tool through slits in the collet, as seen above.

MEGA ER SOLID NUT Slot-free outer diameter increases rigidity of the nut. ER NUT

Thrust Ball Bearing

MEGA ER NUT A notch-free nut prevents vibration and noise. Steel balls in the thrust bearing are retained by a mechanism inside the nut designed for high-speed operation. MEGA NUT is the recommended nut to achieve high accuracy and clamping force.

Basic nut with surface treatment for friction reduction.

9

Slit-Through Coolant with Standard MEGA E NUT

Best Runout Accuracy in The World ERC COLLET

Guaranteed Max Runout

AT COLLET NOSE 3μm at end of test bar 1 μm

.00004"

.00012"

Each ERC collet is inspected twice (0º and 180º) at four times diameter to guarantee the runout accuracy.

4d

Powerful Clamping Force

All BIG Collets are AA Grade and inspected twice for accuracy

Extended Clamping Area

Bearings

High Rigidity Body

Difference in Runout Accuracy

By increasing the contact length of the internal taper of chuck bodies, the undesired overhang of the collet is reduced. This modification of the current DIN standard improves 3 of the most important requirements a collet chuck: rigidity, runout accuracy & clamping force.

.0010

Shallow Taper

Seals

.0008

MEGA E COLLET Exact sizes, shallow taper and extended clamping length enhances the clamping and self-centering forces for stable performance.

Competitor’s ER Chuck

.0006

.0004

MEGA ER

AT COLLET NOSE 3μm at end of test bar 1 μm

Short

Guaranteed Max Runout

MEGA ER GRIP

.0002

.00004" .00012" 4d

0

2

3

4

5

1

Number of Measurements

All BIG Collets are AA Grade and inspected twice for accuracy

High-precision runout accuracy less than .00012" (3μm) at 4xD improves the workpiece surface finish and extends tool life. Repeatability has less than .00006" (1.5μm) of variance.

Current DIN Standard

Long

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