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Mongtec HSK-E shrink fit chucks

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

50 article numbers on the HSK form E (DIN 69893-5, symmetric, 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 E (DIN 69893-5, symmetric, 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	50
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.

HSK25E — 1 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK25EQSF06Q50	Ø6	15	19	50	40	36	5	M5

HSK32E — 7 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK32EQSF03Q60	Ø3	15	20	60	40	-	-	-
HSK32EQSF04Q60	Ø4	15	20	60	40	-	-	-
HSK32EQSF05Q60	Ø5	15	20	60	40	-	-	-
HSK32EQSF06Q70	Ø6	20	26	70	50	36	10	M5
HSK32EQSF08Q70	Ø8	20	26	70	50	36	10	M6
HSK32EQSF10Q70	Ø10	24	29	70	50	42	10	M8x1
HSK32EQSF12Q70	Ø12	24	29	70	50	47	10	M10x1

HSK40E — 22 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK40EQSF03Q60	Ø3	15	20	60	40	-	-	-
HSK40EQSF04Q60	Ø4	15	20	60	40	-	-	-
HSK40EQSF05Q60	Ø5	15	20	60	40	-	-	-
HSK40EQSF06Q65	Ø6	21	27	65	45	36	10	M5
HSK40EQSF08Q65	Ø8	21	27	65	45	36	10	M6
HSK40EQSF10Q65	Ø10	24	30	65	45	42	10	M8x1
HSK40EQSF12Q65	Ø12	24	30	65	45	47	10	M10x1
HSK40EQSF03Q80	Ø3	15	20	80	60	-	-	-
HSK40EQSF04Q80	Ø4	15	20	80	60	-	-	-
HSK40EQSF05Q80	Ø5	15	20	80	60	-	-	-
HSK40EQSF06Q80	Ø6	21	27	80	60	36	10	M5
HSK40EQSF08Q80	Ø8	21	27	80	60	36	10	M6
HSK40EQSF10Q80	Ø10	24	32	80	60	42	10	M8x1
HSK40EQSF12Q90	Ø12	24	32	90	70	47	10	M10x1
HSK40EQSF16Q90	Ø16	27	34	90	70	50	10	M12x1
HSK40EQSF03Q120	Ø3	15	20	120	100	-	-	-
HSK40EQSF04Q120	Ø4	15	20	120	100	-	-	-
HSK40EQSF05Q120	Ø5	15	20	120	100	-	-	-
HSK40EQSF06Q120	Ø6	21	27	120	100	36	10	M5
HSK40EQSF08Q120	Ø8	21	27	120	100	36	10	M6
HSK40EQSF10Q120	Ø10	24	32	120	100	42	10	M8x1
HSK40EQSF12Q120	Ø12	24	32	120	100	47	10	M10x1

HSK50E — 11 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK50EQSF03Q80	Ø3	15	20	80	54	-	-	-
HSK50EQSF04Q80	Ø4	15	20	80	54	-	-	-
HSK50EQSF05Q80	Ø5	15	20	80	54	-	-	-
HSK50EQSF06Q80	Ø6	21	27	80	54	36	10	M5
HSK50EQSF08Q80	Ø8	21	27	80	54	36	10	M6
HSK50EQSF10Q85	Ø10	24	32	85	59	42	10	M8x1
HSK50EQSF12Q90	Ø12	24	32	90	64	47	10	M10x1
HSK50EQSF14Q90	Ø14	27	34	90	64	47	10	M10x1
HSK50EQSF16Q95	Ø16	27	34	95	69	50	10	M12x1
HSK50EQSF18Q95	Ø18	33	41	95	69	50	10	M12x1
HSK50EQSF20Q100	Ø20	33	41	100	74	52	10	M16x1

HSK63E — 9 article numbers

Article no.	Bore Ø d	D	D1	L	L2	L1	N	G
HSK63EQSF06Q90	Ø6	21	27	90	64	36	10	M5
HSK63EQSF08Q90	Ø8	21	27	90	64	36	10	M6
HSK63EQSF10Q90	Ø10	24	32	90	64	42	10	M8x1
HSK63EQSF12Q90	Ø12	24	32	90	64	47	10	M10x1
HSK63EQSF14Q90	Ø14	27	34	90	64	47	10	M10x1
HSK63EQSF16Q95	Ø16	27	34	95	69	50	10	M12x1
HSK63EQSF18Q95	Ø18	33	42	95	69	50	10	M12x1
HSK63EQSF20Q100	Ø20	33	42	100	74	52	10	M16x1
HSK63EQSF25Q115	Ø25	44	53	115	89	58	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-E 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-E?

Bore diameters from Ø3 to Ø32 mm across 50 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.

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