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Mongtec HSK-F shrink fit chucks

Q: What run-out do Mongtec HSK-F shrink fit chucks hold?

Run-out is ≤ 0.003 mm at 3×D and the chucks are balanced to G2.5 at 25,000 rpm, which is what makes shrink fit the first choice for high-speed and deep-cavity work.

Q: 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; ask for the shrink fit machine range with your enquiry.

44 article numbers on the HSK form F (DIN 69893-6, symmetric, wood/high speed) shank, bore Ø3–32 mm, 4.5° clamping taper. 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

Shank	HSK form F (DIN 69893-6, symmetric, wood/high speed)
Clamping taper	4.5°
Bore range	Ø3 – Ø32 mm
Run-out (A)	≤ 0.003 mm
Balance	G2.5 / 25,000 rpm
Coolant	Form AD (through-spindle)
Article numbers	44
Brand	Mongtec 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.

HSK40F — 12 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK40FQSF03Q60	Ø3	15	20	60	40	-	-	-
HSK40FQSF04Q60	Ø4	15	20	60	40	-	-	-
HSK40FQSF05Q60	Ø5	15	20	60	40	-	-	-
HSK40FQSF06Q65	Ø6	21	27	65	45	36	5	M5
HSK40FQSF08Q65	Ø8	21	27	65	45	36	5	M6
HSK40FQSF10Q65	Ø10	24	31	65	45	42	5	M8x1
HSK40FQSF12Q65	Ø12	24	31	65	45	42	5	M10x1
HSK40FQSF06Q80	Ø6	21	27	80	60	36	10	M5
HSK40FQSF08Q80	Ø8	21	27	80	60	36	10	M6
HSK40FQSF10Q80	Ø10	24	32	80	60	42	10	M8x1
HSK40FQSF12Q90	Ø12	24	32	90	70	47	10	M10x1
HSK40FQSF16Q90	Ø16	27	34	90	70	50	10	M12x1

HSK63F — 32 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK63FQSF04Q90	Ø4	15	20	90	54	-	-	-
HSK63FQSF06Q90	Ø6	21	27	90	64	36	10	M5
HSK63FQSF08Q90	Ø8	21	27	90	64	36	10	M6
HSK63FQSF10Q90	Ø10	24	32	90	64	42	10	M8x1
HSK63FQSF12Q90	Ø12	24	32	90	64	47	10	M10x1
HSK63FQSF14Q95	Ø14	27	34	95	69	47	10	M10x1
HSK63FQSF16Q95	Ø16	27	34	95	69	50	10	M12x1
HSK63FQSF18Q95	Ø18	33	42	95	69	50	10	M12x1
HSK63FQSF20Q100	Ø20	33	42	100	74	52	10	M16x1
HSK63FQSF25Q115	Ø25	36	42	115	89	58	10	M16x1
HSK63FQSF03Q120	Ø3	15	20	120	94	-	-	-
HSK63FQSF04Q120	Ø4	15	20	120	94	-	-	-
HSK63FQSF05Q120	Ø5	15	20	120	94	-	-	-
HSK63FQSF06Q120	Ø6	21	27	120	94	36	10	M5
HSK63FQSF08Q120	Ø8	21	27	120	94	36	10	M6
HSK63FQSF10Q120	Ø10	24	32	120	94	42	10	M8x1
HSK63FQSF12Q120	Ø12	24	32	120	94	47	10	M10x1
HSK63FQSF14Q120	Ø14	27	34	120	94	47	10	M10x1
HSK63FQSF16Q120	Ø16	27	34	120	94	50	10	M12x1
HSK63FQSF18Q120	Ø18	33	42	120	94	50	10	M12x1
HSK63FQSF20Q120	Ø20	33	42	120	94	52	10	M16x1
HSK63FQSF03Q160	Ø3	15	27	160	134	-	-	-
HSK63FQSF04Q160	Ø4	15	27	160	134	-	-	-
HSK63FQSF05Q160	Ø5	15	27	160	134	-	-	-
HSK63FQSF06Q160	Ø6	21	32	160	134	36	10	M5
HSK63FQSF08Q160	Ø8	21	32	160	134	36	10	M6
HSK63FQSF10Q160	Ø10	24	34	160	134	42	10	M8x1
HSK63FQSF12Q160	Ø12	24	34	160	134	47	10	M10x1
HSK63FQSF14Q160	Ø14	27	42	160	134	47	10	M10x1
HSK63FQSF16Q160	Ø16	27	42	160	134	50	10	M12x1
HSK63FQSF18Q160	Ø18	33	51	160	134	50	10	M12x1
HSK63FQSF20Q160	Ø20	33	51	160	134	52	10	M16x1

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-F 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-F?

Bore diameters from Ø3 to Ø32 mm across 44 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-F shrink fit chucks →

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