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Mongtec HSK-A shrink fit chucks

Q: What run-out do Mongtec HSK-A 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.

147 article numbers on the HSK form A (DIN 69893-1) 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 A (DIN 69893-1)
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	147
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.

HSK32A — 7 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK32AQSF03Q65	Ø3	15	20	65	45	-	-	-
HSK32AQSF04Q65	Ø4	15	20	65	45	-	-	-
HSK32AQSF05Q65	Ø5	15	20	65	45	-	-	-
HSK32AQSF06Q75	Ø6	21	26	75	55	36	10	M5
HSK32AQSF08Q75	Ø8	21	26	75	55	36	10	M6
HSK32AQSF10Q75	Ø10	24	29	75	55	42	10	M8x1
HSK32AQSF12Q80	Ø12	24	29	80	60	47	5	M10x1

HSK40A — 9 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK40AQSF03Q60	Ø3	15	20	60	40	-	-	-
HSK40AQSF04Q60	Ø4	15	20	60	40	-	-	-
HSK40AQSF05Q60	Ø5	15	20	60	40	-	-	-
HSK40AQSF06Q80	Ø6	21	27	80	60	36	10	M5
HSK40AQSF08Q80	Ø8	21	27	80	60	36	10	M6
HSK40AQSF10Q80	Ø10	24	32	80	60	42	10	M8x1
HSK40AQSF12Q90	Ø12	24	32	90	70	47	10	M10x1
HSK40AQSF14Q90	Ø14	27	34	90	70	47	10	M10x1
HSK40AQSF16Q90	Ø16	27	34	90	70	50	10	M12x1

HSK50A — 11 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK50AQSF03Q80	Ø3	15	20	80	54	-	-	-
HSK50AQSF04Q80	Ø4	15	20	80	54	-	-	-
HSK50AQSF05Q80	Ø5	15	20	80	54	-	-	-
HSK50AQSF06Q80	Ø6	21	27	80	54	36	10	M5
HSK50AQSF08Q80	Ø8	21	27	80	54	36	10	M6
HSK50AQSF10Q85	Ø10	24	32	85	59	42	10	M8x1
HSK50AQSF12Q90	Ø12	24	32	90	64	47	10	M10x1
HSK50AQSF14Q90	Ø14	27	34	90	64	47	10	M10x1
HSK50AQSF16Q95	Ø16	27	34	95	69	50	10	M12x1
HSK50AQSF18Q95	Ø18	33	42	95	69	50	10	M12x1
HSK50AQSF20Q100	Ø20	33	42	100	74	52	10	M16x1

HSK63A — 68 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK63AQSF03Q80	Ø3	15	20	80	54	-	-	-
HSK63AQSF04Q80	Ø4	15	20	80	54	-	-	-
HSK63AQSF05Q80	Ø5	15	20	80	54	-	-	-
HSK63AQSF06Q80	Ø6	21	26.5	80	54	36	10	M5
HSK63AQSF08Q80	Ø8	21	26.5	80	54	36	10	M6
HSK63AQSF10Q85	Ø10	24	30.5	85	59	42	10	M8x1
HSK63AQSF12Q90	Ø12	24	31	90	64	47	10	M10x1
HSK63AQSF14Q90	Ø14	27	34	90	64	47	10	M10x1
HSK63AQSF16Q95	Ø16	27	34	95	69	50	10	M12x1
HSK63AQSF18Q95	Ø18	33	41	95	69	50	10	M12x1
HSK63AQSF20Q100	Ø20	33	42	100	74	52	10	M16x1
HSK63AQSF25Q115	Ø25	44	52.5	115	89	58	10	M16x1
HSK63AQSF32Q120	Ø32	44	52.5	120	94	62	10	M16x1
HSK63AQSF03Q120	Ø3	15	20	120	94	-	-	-
HSK63AQSF04Q120	Ø4	15	20	120	94	-	-	-
HSK63AQSF05Q120	Ø5	15	20	120	94	-	-	-
HSK63AQSF06Q120	Ø6	21	27	120	94	36	10	M5
HSK63AQSF08Q120	Ø8	21	27	120	94	36	10	M6
HSK63AQSF10Q120	Ø10	24	32	120	94	42	10	M8x1
HSK63AQSF12Q120	Ø12	24	32	120	94	47	10	M10x1
HSK63AQSF14Q120	Ø14	27	34	120	94	47	10	M10x1
HSK63AQSF16Q120	Ø16	27	34	120	94	50	10	M12x1
HSK63AQSF18Q120	Ø18	33	42	120	94	50	10	M12x1
HSK63AQSF20Q120	Ø20	33	42	120	94	52	10	M16x1
HSK63AQSF25Q120	Ø25	44	52.5	120	94	58	10	M16x1
HSK63AQSF03Q160	Ø3	15	25	160	134	-	-	-
HSK63AQSF04Q160	Ø4	15	25	160	134	-	-	-
HSK63AQSF05Q160	Ø5	15	25	160	134	-	-	-
HSK63AQSF06Q160	Ø6	21	32	160	134	36	10	M5
HSK63AQSF08Q160	Ø8	21	32	160	134	36	10	M6
HSK63AQSF10Q160	Ø10	24	34	160	134	42	10	M8x1
HSK63AQSF12Q160	Ø12	24	34	160	134	47	10	M10x1
HSK63AQSF14Q160	Ø14	27	42	160	134	47	10	M10x1
HSK63AQSF16Q160	Ø16	27	42	160	134	50	10	M12x1
HSK63AQSF18Q160	Ø18	33	51	160	134	50	10	M12x1
HSK63AQSF20Q160	Ø20	33	51	160	134	52	10	M16x1
HSK63AQSF25Q160	Ø25	44	52.5	160	134	58	10	M16x1
HSK63AQSF32Q160	Ø32	44	52.5	160	134	62	10	M16x1
HSK63AQSF06Q200	Ø6	21	32	200	174	36	10	M5
HSK63AQSF08Q200	Ø8	21	32	200	174	36	10	M6
HSK63AQSF10Q200	Ø10	24	34	200	174	42	10	M8x1
HSK63AQSF12Q200	Ø12	24	34	200	174	47	10	M10x1
HSK63AQSF14Q200	Ø14	27	42	200	174	47	10	M10x1
HSK63AQSF16Q200	Ø16	27	42	200	174	50	10	M12x1
HSK63AQSF18Q200	Ø18	33	51	200	174	50	10	M12x1
HSK63AQSF20Q200	Ø20	33	51	200	174	52	10	M16x1
HSK63AQSF25Q200	Ø25	44	52.5	200	174	58	10	M16x1
HSK63AQSF32Q200	Ø32	44	52.5	200	174	62	10	M16x1
HSK63AQSF06Q250	Ø6	21	32	250	224	36	10	M5
HSK63AQSF08Q250	Ø8	21	32	250	224	36	10	M6
HSK63AQSF10Q250	Ø10	24	34	250	224	42	10	M8x1
HSK63AQSF12Q250	Ø12	24	34	250	224	47	10	M10x1
HSK63AQSF14Q250	Ø14	27	42	250	224	47	10	M10x1
HSK63AQSF16Q250	Ø16	27	42	250	224	50	10	M12x1
HSK63AQSF18Q250	Ø18	33	51	250	224	50	10	M12x1
HSK63AQSF20Q250	Ø20	33	51	250	224	52	10	M16x1
HSK63AQSF25Q250	Ø25	44	52.5	250	224	58	10	M16x1
HSK63AQSF32Q250	Ø32	44	52.5	250	224	62	10	M16x1
HSK63AQSF06Q300	Ø6	21	32	300	274	36	10	M5
HSK63AQSF08Q300	Ø8	21	32	300	274	36	10	M6
HSK63AQSF10Q300	Ø10	24	34	300	274	42	10	M8x1
HSK63AQSF12Q300	Ø12	24	34	300	274	47	10	M10x1
HSK63AQSF14Q300	Ø14	27	42	300	274	47	10	M10x1
HSK63AQSF16Q300	Ø16	27	42	300	274	50	10	M12x1
HSK63AQSF18Q300	Ø18	33	51	300	274	50	10	M12x1
HSK63AQSF20Q300	Ø20	33	51	300	274	52	10	M16x1
HSK63AQSF25Q300	Ø25	44	52.5	300	274	58	10	M16x1
HSK63AQSF32Q300	Ø32	44	52.5	300	274	62	10	M16x1

HSK80A — 10 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK80AQSF06Q85	Ø6	21	27	85	59	36	10	M5
HSK80AQSF08Q85	Ø8	21	27	85	59	36	10	M6
HSK80AQSF10Q90	Ø10	24	32	90	64	42	10	M8x1
HSK80AQSF12Q95	Ø12	24	32	95	69	47	10	M10x1
HSK80AQSF14Q95	Ø14	27	34	95	69	47	10	M10x1
HSK80AQSF16Q100	Ø16	27	34	100	74	50	10	M12x1
HSK80AQSF18Q100	Ø18	33	42	100	74	50	10	M12x1
HSK80AQSF20Q105	Ø20	33	42	105	79	52	10	M16x1
HSK80AQSF25Q115	Ø25	44	53	115	89	58	10	M16x1
HSK80AQSF32Q120	Ø32	44	53	120	94	62	10	M16x1

HSK100A — 42 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK100AQSF03Q85	Ø3	15	20	85	56	-	-	-
HSK100AQSF04Q85	Ø4	15	20	85	56	-	-	-
HSK100AQSF05Q85	Ø5	15	20	85	56	-	-	-
HSK100AQSF06Q85	Ø6	21	26.5	85	56	36	10	M5
HSK100AQSF08Q85	Ø8	21	26.5	85	56	36	10	M6
HSK100AQSF10Q90	Ø10	24	30.5	90	61	42	10	M8x1
HSK100AQSF12Q95	Ø12	24	31	95	66	47	10	M10x1
HSK100AQSF14Q95	Ø14	27	34	95	66	47	10	M10x1
HSK100AQSF16Q100	Ø16	27	34	100	71	50	10	M12x1
HSK100AQSF18Q100	Ø18	33	41	100	71	50	10	M12x1
HSK100AQSF20Q105	Ø20	33	42	105	76	52	10	M16x1
HSK100AQSF25Q115	Ø25	44	53	115	86	58	10	M16x1
HSK100AQSF32Q120	Ø32	44	53	120	91	62	10	M16x1
HSK100AQSF06Q120	Ø6	21	27	120	91	36	10	M5
HSK100AQSF08Q120	Ø8	21	27	120	91	36	10	M6
HSK100AQSF10Q120	Ø10	24	32	120	91	42	10	M8x1
HSK100AQSF12Q120	Ø12	24	32	120	91	47	10	M10x1
HSK100AQSF14Q120	Ø14	27	34	120	91	47	10	M10x1
HSK100AQSF16Q120	Ø16	27	34	120	91	50	10	M12x1
HSK100AQSF18Q120	Ø18	33	42	120	91	50	10	M12x1
HSK100AQSF20Q120	Ø20	33	42	120	91	52	10	M16x1
HSK100AQSF25Q120	Ø25	44	53	120	91	58	10	M16x1
HSK100AQSF06Q160	Ø6	21	32	160	131	36	10	M5
HSK100AQSF08Q160	Ø8	21	32	160	131	36	10	M6
HSK100AQSF10Q160	Ø10	24	34	160	131	42	10	M8x1
HSK100AQSF12Q160	Ø12	24	34	160	131	47	10	M10x1
HSK100AQSF14Q160	Ø14	27	42	160	131	47	10	M10x1
HSK100AQSF16Q160	Ø16	27	42	160	131	50	10	M12x1
HSK100AQSF18Q160	Ø18	33	50.5	160	131	50	10	M12x1
HSK100AQSF20Q160	Ø20	33	50.5	160	131	52	10	M16x1
HSK100AQSF25Q160	Ø25	44	60	160	131	58	10	M16x1
HSK100AQSF32Q160	Ø32	44	60	160	131	62	10	M16x1
HSK100AQSF06Q200	Ø6	21	32	200	171	36	10	M5
HSK100AQSF08Q200	Ø8	21	32	200	171	36	10	M6
HSK100AQSF10Q200	Ø10	24	34	200	171	42	10	M8x1
HSK100AQSF12Q200	Ø12	24	34	200	171	47	10	M10x1
HSK100AQSF14Q200	Ø14	27	42	200	171	47	10	M10x1
HSK100AQSF16Q200	Ø16	27	42	200	171	50	10	M12x1
HSK100AQSF18Q200	Ø18	33	51	200	171	50	10	M12x1
HSK100AQSF20Q200	Ø20	33	51	200	171	52	10	M16x1
HSK100AQSF25Q200	Ø25	44	60	200	171	58	10	M16x1
HSK100AQSF32Q200	Ø32	44	—	200	171	62	10	M16x1

Source: Mongtec Shrink Fit Chuck catalogue, Ver 2026.

One article number (HSK100AQSF32Q200) is printed in the catalogue with a D1 value that does not match the rest of its size group. Rather than publish a figure we cannot stand behind, D1 is shown as — and confirmed in writing at RFQ.

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 147 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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