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Mongtec HSK-A shrink fit chucks — through coolant

67 article numbers on the HSK form A (DIN 69893-1) shank, bore Ø3–32 mm, 4.5° clamping taper, with through-coolant supply. Run-out ≤ 0.003 mm, balanced G2.5 / 25,000 rpm, coolant form AD. Mongtec Precision is a Taiwanese brand, designed and engineered in Taichung, Taiwan.

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Why shrink fit

A shrink fit chuck holds the tool by thermal interference alone: the bore is heated, the shank drops in, and the bore contracts onto it. There is no collet, no nut and no clamping mechanism between the tool and the holder, so the assembly is a single slender body — the highest holding force per unit of diameter, the slimmest profile for deep cavities, and no rotating parts to unbalance at speed.

That is why shrink fit dominates high-speed machining: run-out at ≤ 0.003 mm and balance to G2.5 at 25,000 rpm are achievable because there is nothing in the joint to move.

Specification

ShankHSK form A (DIN 69893-1)
Clamping taper4.5°
Bore rangeØ3 – Ø32 mm
Run-out (A)≤ 0.003 mm
BalanceG2.5 / 25,000 rpm
CoolantThrough coolant (form AD) — centre and flange outlet
Article numbers67
BrandMongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan

Article numbers — dimensions in mm

d = tool bore · D = nose diameter · D1 = body diameter · L = gauge length · L2 = projection · L1, N, G = clamping-screw and balancing-ring data.

HSK63A — 38 article numbers

Article no.Bore Ø dDD1LL2L1NG
HSK63AQSF03Q80KØ315208054---
HSK63AQSF04Q80KØ415208054---
HSK63AQSF05Q80KØ515208054---
HSK63AQSF06Q80KØ62126.580543610M5
HSK63AQSF08Q80KØ82126.580543610M6
HSK63AQSF10Q85KØ102430.585594210M8x1
HSK63AQSF12Q90KØ12243190644710M10x1
HSK63AQSF14Q90KØ14273490644710M10x1
HSK63AQSF16Q95KØ16273495695010M12x1
HSK63AQSF18Q95KØ18334195695010M12x1
HSK63AQSF20Q100KØ203342100745210M16x1
HSK63AQSF25Q115KØ254452.5115895810M16x1
HSK63AQSF32Q120KØ324452.5120946210M16x1
HSK63AQSF03Q120KØ3152012094---
HSK63AQSF04Q120KØ4152012094---
HSK63AQSF05Q120KØ5152012094---
HSK63AQSF06Q120KØ62127120943610M5
HSK63AQSF08Q120KØ82127120943610M6
HSK63AQSF10Q120KØ102432120944210M8x1
HSK63AQSF12Q120KØ122432120944710M10x1
HSK63AQSF14Q120KØ142734120944710M10x1
HSK63AQSF16Q120KØ162734120945010M12x1
HSK63AQSF18Q120KØ183342120945010M12x1
HSK63AQSF20Q120KØ203342120945210M16x1
HSK63AQSF25Q120KØ254452.5120945810M16x1
HSK63AQSF03Q160KØ31525160134---
HSK63AQSF04Q160KØ41525160134---
HSK63AQSF05Q160KØ51525160134---
HSK63AQSF06Q160KØ621321601343610M5
HSK63AQSF08Q160KØ821321601343610M6
HSK63AQSF10Q160KØ1024341601344210M8x1
HSK63AQSF12Q160KØ1224341601344710M10x1
HSK63AQSF14Q160KØ1427421601344710M10x1
HSK63AQSF16Q160KØ1627421601345010M12x1
HSK63AQSF18Q160KØ1833511601345010M12x1
HSK63AQSF20Q160KØ2033511601345210M16x1
HSK63AQSF25Q160KØ254452.51601345810M16x1
HSK63AQSF32Q160KØ324452.51601346210M16x1

HSK100A — 29 article numbers

Article no.Bore Ø dDD1LL2L1NG
HSK100AQSF06Q85KØ62126.585563610M5
HSK100AQSF08Q85KØ82126.585563610M6
HSK100AQSF10Q90KØ102430.590614210M8x1
HSK100AQSF12Q95KØ12243195664710M10x1
HSK100AQSF14Q95KØ14273495664710M10x1
HSK100AQSF16Q100KØ162734100715010M12x1
HSK100AQSF18Q100KØ183342100715010M12x1
HSK100AQSF20Q105KØ203342105765210M16x1
HSK100AQSF25Q115KØ254453115865810M16x1
HSK100AQSF32Q120KØ324453120916210M16x1
HSK100AQSF06Q120KØ62127120913610M5
HSK100AQSF08Q120KØ82127120913610M6
HSK100AQSF10Q120KØ102432120914210M8x1
HSK100AQSF12Q120KØ122432120914710M10x1
HSK100AQSF14Q120KØ142734120914710M10x1
HSK100AQSF16Q120KØ162734120915010M12x1
HSK100AQSF18Q120KØ183342120915010M12x1
HSK100AQSF20Q120KØ203342120915210M16x1
HSK100AQSF25Q120KØ254453120915810M16x1
HSK100AQSF06Q160KØ621321601313610M5
HSK100AQSF08Q160KØ821321601313610M6
HSK100AQSF10Q160KØ1024341601314210M8x1
HSK100AQSF12Q160KØ1224341601314710M10x1
HSK100AQSF14Q160KØ1427421601314710M10x1
HSK100AQSF16Q160KØ1627421601315010M12x1
HSK100AQSF18Q160KØ1833511601315010M12x1
HSK100AQSF20Q160KØ2033511601315210M16x1
HSK100AQSF25Q160KØ2544601601315810M16x1
HSK100AQSF32Q160KØ3244601601316210M16x1

Source: Mongtec Shrink Fit Chuck catalogue, Ver 2026.

A shrink fit holder needs a shrink fit unit. Tools are changed by induction heating, not by hand. If you do not already run one, ask for the Mongtec shrink fit machine range with your enquiry — holder and unit are quoted together.

Frequently asked

What run-out do Mongtec HSK-A shrink fit chucks hold?

Run-out is ≤ 0.003 mm and the chucks are balanced to G2.5 at 25,000 rpm. There is no collet or nut in the joint, so there is nothing to shift under load or at speed.

Which bore sizes are available in HSK-A?

Bore diameters from Ø3 to Ø32 mm across 67 published article numbers, in several gauge lengths per bore — pick the shortest holder that still reaches the feature.

Do I need a special machine to fit these?

Yes. A shrink fit induction unit heats the bore to release and clamp the tool. Mongtec supplies the machines as well as the holders.

Get a quotation

Send the spindle interface, the tool shank diameters you run and the reach you need. Dimensioned drawings are supplied by email once the enquiry is open.

Request HSK-A shrink fit chucks →

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