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Mongtec HSK-A face mill holders

53 article numbers on HSK50A · HSK63A · HSK80A · HSK100A. Shell mill arbors on the HSK-A taper, pilot Ø16 to Ø60 mm, projections from 50 to 300 mm. Mongtec Precision is a Taiwanese brand, designed and engineered in Taichung, Taiwan.

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The one operation HSK was designed for

Face milling loads a holder harder than anything else a machining centre does. The cutter is wide, every insert enters and leaves the cut once per revolution, and the resulting force is both large and cyclic — the exact excitation that finds any flexibility in the spindle-holder joint.

This is where HSK's face contact pays for itself most visibly. A taper-only joint under a wide interrupted cut has a small amount of angular compliance at the nose, and that compliance is what turns into chatter marks and dished surfaces. Clamping the flange against the spindle face removes it.

Sizing the arbor

d is the pilot diameter and must match the cutter bore exactly — Ø16, 22, 27, 32, 40 or 60 mm, the standard bore sizes. L is the projection, catalogued from 50 mm to 300 mm on the same pilot.

Deflection at the tip goes with the cube of the overhang, so a 200 mm arbor is roughly eight times more flexible than a 100 mm one on the same pilot. Take the shortest projection that clears the fixture. When a long one is unavoidable, reduce the radial width of cut rather than the feed — radial force is what bends it.

The FMB40 and FMB60 sizes are catalogued with a pilot flange (dimensions D1 and a second thread m). The flange gives the cutter face contact of its own, which is what keeps a wide cutter running flat instead of dishing under load.

Article numbers — dimensions in mm

Dimension symbols are the catalogue's own and refer to the dimension drawing printed for each product. A dash means the catalogue does not print a usable value for that cell; those are confirmed in writing at RFQ. Where a table's printed header disagrees with its drawing, a note above the table says so.

Face Mill Holder — 41 article numbers

Article no.	d	D	H	L	M
HSK50AQFMB16Q50	16	38	17	50	M8
HSK50AQFMB22Q60	22	48	19	60	M10
HSK50AQFMB27Q60	27	58	21	60	M12
HSK50AQFMB32Q60	32	78	24	60	M16
HSK63AQFMB16Q50	16	38	17	50	M8
HSK63AQFMB22Q50	22	48	19	50	M10
HSK63AQFMB27Q60	27	58	21	60	M12
HSK63AQFMB32Q60	32	78	24	60	M16
HSK63AQFMB16Q100	16	38	17	100	M8
HSK63AQFMB22Q100	22	48	19	100	M10
HSK63AQFMB27Q100	27	58	21	100	M12
HSK63AQFMB32Q100	32	78	24	100	M16
HSK63AQFMB16Q160	16	38	17	160	M8
HSK63AQFMB22Q160	22	48	19	160	M10
HSK63AQFMB27Q160	27	58	21	160	M12
HSK63AQFMB32Q160	32	78	24	160	M16
HSK63AQFMB16Q200	16	38	17	200	M8
HSK63AQFMB22Q200	22	48	19	200	M10
HSK63AQFMB27Q200	27	58	21	200	M12
HSK63AQFMB32Q200	32	78	24	200	M16
HSK80AQFMB22Q50	22	48	19	50	M10
HSK80AQFMB27Q50	27	58	21	50	M12
HSK80AQFMB32Q60	32	78	24	60	M16
HSK100AQFMB22Q50	22	48	19	50	M10
HSK100AQFMB27Q50	27	58	21	50	M12
HSK100AQFMB32Q60	32	78	24	60	M16
HSK100AQFMB22Q100	22	48	19	100	M10
HSK100AQFMB27Q100	27	58	21	100	M12
HSK100AQFMB32Q100	32	78	24	100	M16
HSK100AQFMB22Q160	22	48	19	160	M10
HSK100AQFMB27Q160	27	58	21	160	M12
HSK100AQFMB32Q160	32	78	24	160	M16
HSK100AQFMB22Q200	22	48	19	200	M10
HSK100AQFMB27Q200	27	58	21	200	M12
HSK100AQFMB32Q200	32	78	24	200	M16
HSK100AQFMB22Q250	22	48	19	250	M10
HSK100AQFMB27Q250	27	58	21	250	M12
HSK100AQFMB32Q250	32	78	24	250	M16
HSK100AQFMB22Q300	22	48	19	300	M10
HSK100AQFMB27Q300	27	58	21	300	M12
HSK100AQFMB32Q300	32	78	24	300	M16

Face Mill Holder — 12 article numbers

Article no.	d	D	D1	H	L	M	m
HSK63AQFMB40Q60	40	88	66.7	27	60	M20	M12
HSK63AQFMB40Q100	40	88	66.7	27	100	M20	M12
HSK63AQFMB40Q160	40	88	66.7	27	160	M20	M12
HSK63AQFMB40Q200	40	88	66.7	27	200	M20	M12
HSK80AQFMB40Q60	40	88	66.7	27	60	M20	M12
HSK100AQFMB40Q60	40	88	66.7	27	60	M20	M12
HSK100AQFMB60Q70	60	129	101.6	25	70	M30	M16
HSK100AQFMB40Q100	40	88	66.7	27	100	M20	M12
HSK100AQFMB40Q160	40	88	66.7	27	160	M20	M12
HSK100AQFMB40Q200	40	88	66.7	27	200	M20	M12
HSK100AQFMB40Q250	40	88	66.7	27	250	M20	M12
HSK100AQFMB40Q300	40	88	66.7	27	300	M20	M12

Source: Mongtec HSK-A Tooling System catalogue, Ver 2026.

Check the HSK form, not just the size. HSK-A, C, E and F share the size number but not the drive slots, coolant provision or flange geometry, and they are not interchangeable. Send Mongtec the machine make, model and the spindle interface designation with the RFQ.

Frequently asked

Which pilot do I order?

The bore of the cutter, not its cutting diameter. A Ø100 mm face mill commonly has a Ø32 mm bore.

Is a long HSK arbor stiffer than a long BT arbor?

At the spindle joint, yes — face contact removes the angular compliance there. Past the flange it is the same steel and the same cube law, so a long HSK arbor is still a long arbor.

What is the m dimension?

A second thread on the pilot-flange versions, in addition to the main central screw M. Confirm the fastener specification against your cutter with Mongtec at RFQ.