NSK Nakanishi QC3-K Quick Change Collet Holder - for CHK Collets

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THIS IS INDUSTRIAL, NOT DENTAL

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NSK Nakanishi make high speed spindles for

MACHINE TOOLS AND AUTOMATION, and they also

make dental and jewellery handpieces.

THIS IS THE INDUSTRIAL SIDE.

QC3-K is a QUICK CHANGE COLLET HOLDER for

Nakanishi's QC-series high frequency

spindles.

If you are looking for a handpiece collet for a

bench micromotor, this is not that part.

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WHAT IT IS FOR

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COLLET SERIES: CHK

CAPACITY: φ0.5 to 6.35 mm

FITS: Nakanishi QC-type spindles, including

the NRR3060-QC

The spindle it belongs to:

OUTER DIAMETER: 30 mm

MAXIMUM SPEED: 60,000 min-1

SPINDLE ACCURACY: WITHIN 1 MICRON

LEVER OPERATING ANGLE: 90°

At 60,000 rpm and 1 micron of runout, the holder

is not a convenience item. It is part of the

accuracy chain.

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THE POINT IS OFF-MACHINE TOOL SETTING

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Nakanishi's own statement of the benefit:

"Quick and easy collet holder change with

lever chucking mechanism."

"ENHANCING PRODUCTIVITY BY ENABLING EXTERNAL

TOOL SET-UP."

That second line is the whole product.

Conventionally, changing a tool means stopping the

spindle, loosening the collet at the machine,

removing the tool, fitting the next one, setting

length, and running again. Minutes, every time.

With QC holders, the tool is set into a holder AT

THE BENCH, away from the machine. At the machine,

a 90° lever movement releases one holder and

accepts the next.

SECONDS, NOT MINUTES.

WHICH MEANS YOU NEED MORE THAN ONE HOLDER.

A single holder cannot deliver off-machine

set-up - there is nothing to swap to.

Operations running this system typically hold one

holder per tool in the job. Message me for

quantity.

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CHK IS THE WIDEST RANGE

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Nakanishi offer three holder and collet families

for these spindles:

QC3-K / CHK collets φ0.5 - 6.35 mm

QC3-A / CHA collets φ0.5 - 4.0 mm

QC3-SS / CHSS collets φ1.0 - 3.175 mm

THIS IS THE QC3-K, FOR CHK - THE WIDEST

CAPACITY OF THE THREE, UP TO 6.35 mm

(1/4 inch).

There is also a QC3-K-R variant. Confirm which

your spindle and application require.

COLLETS ARE A SEPARATE ITEM. Tell me the

shank sizes you run and I will quote CHK

collets.

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OVERVIEW

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Nakanishi build spindles that run at speeds most people's machines cannot.

Sixty thousand rpm, held within a micron, in a 30 mm body that mounts to a

machining centre, a robot, or a purpose-built automation cell. They are

used for PCB routing, micro milling, mould and die finishing, deburring and

the kind of small-diameter work where conventional spindle speeds simply

cannot generate the surface speed.

The QC system exists because a spindle that precise is also a spindle you do

not want to be fiddling with at the machine. Set the tool outside, swap the

holder in, carry on.

Genuine Nakanishi, new, from Japan.

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SPECIFICATIONS

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Brand : NSK Nakanishi (Japan)

Model : QC3-K

Product : Quick change collet

holder

Collet series : CHK

Capacity : φ0.5 - 6.35 mm

(via CHK collets)

Fits : Nakanishi QC-series

spindles, including

NRR3060-QC

Collets : SOLD SEPARATELY

Condition : NEW

Country of origin : Japan

RELATED HOLDERS (not this listing)

QC3-K-R CHK collets, R variant

QC3-A CHA collets, φ0.5 - 4.0 mm

QC3-SS CHSS collets,

φ1.0 - 3.175 mm

[CONFIRM WHETHER A COLLET IS SUPPLIED WITH THIS

HOLDER, AND THE FULL LIST OF COMPATIBLE SPINDLE

MODELS, BEFORE LISTING.]

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KEY FEATURES

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- Quick change collet holder for Nakanishi QC-series spindles

- Takes CHK collets, φ0.5 to 6.35 mm - the widest of the three families

- Enables off-machine tool setting

- Lever chucking, 90° operation

- For spindles running to 60,000 rpm within 1 micron

- Genuine Nakanishi, made in Japan

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APPLICATIONS

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High speed machining, micro milling, PCB routing, mould and die finishing,

deburring, and automated production cells using Nakanishi spindles.

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IMPORTANT NOTES

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CONFIRM YOUR SPINDLE MODEL

Nakanishi build a large range of spindles and not all of them take QC

holders.

Your spindle must be a QC-type.

Confirm which holder family your application

requires - K, A or SS.

Confirm whether you need the standard QC3-K

or the QC3-K-R variant.

Send me your spindle model number and I will check it before you order.

COLLETS ARE SEPARATE

The holder takes CHK collets. Tell me the shank diameters you run and I

will quote them.

ONE HOLDER DOES NOT GIVE YOU OFF-MACHINE SET-UP

Stated plainly because it is the commonest misunderstanding.

The productivity gain comes from having a tool already set in a second

holder while the first is running. Buy accordingly.

Ask me about quantity pricing.

AT 60,000 rpm, BALANCE MATTERS

A holder for a spindle of this speed is a rotating assembly, and everything

about how it is handled affects how it runs.

DO NOT DROP IT. A knocked holder is a holder

with runout.

KEEP THE TAPER AND THE SEATING FACES

SPOTLESSLY CLEAN. A fingerprint or a chip

between mating surfaces is runout you cannot

dial out.

CHECK RUNOUT after fitting, with an

indicator, before committing to a cut.

BALANCE THE TOOL AND HOLDER ASSEMBLY where

your application requires it.

Micron-class accuracy is a property of the whole assembly, not of the

spindle alone.

OBSERVE THE SPINDLE'S TOOL LIMITS

Maximum tool diameter, maximum projection and maximum permissible imbalance

are specified by Nakanishi for each spindle. Exceeding them at these speeds

is dangerous.

Consult the spindle manual.

KEEP THEM CLEAN AND STORED PROPERLY

Holders live in a machine shop, which is the worst place for precision

surfaces.

Wipe before every use

Store in a rack or case, not loose in a

drawer with other tooling

Light oil on unplated surfaces if humidity

is an issue

NO MANUFACTURER WARRANTY OUTSIDE JAPAN

This is a Japanese market genuine Nakanishi part. Nakanishi's warranty and

technical support are administered regionally.

I will handle transit damage or a part that is wrong on arrival myself.

JAPANESE PACKAGING

Japanese packaging and any documentation in Japanese. Nakanishi publish

English catalogues, manuals, DXF and STEP data for these spindles on their

international site - ask me and I will point you to them.

SHIPPED FROM JAPAN

Dispatched from Tokyo, insured, with tracking, packed to protect the

precision surfaces.

Brand	NAKANISHI
MPN	QC3K
Country of Origin	Japan

NSK Nakanishi QC3-K Quick Change Collet Holder for CHK NRR3060-QC Spindle

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