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Mongtec HSK-A adapters, sleeves and special holders

176 article numbers on HSK50A · HSK63A · HSK80A · HSK100A. Morse taper adapters, drill chuck holders, tapping chucks, screw-in cutter holders, boring bar blanks, flange adapters, HSK-C sleeves and ATC gauges on the HSK-A taper. Mongtec Precision is a Taiwanese brand, designed and engineered in Taichung, Taiwan.

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What these are for

Everything here connects something to an HSK-A spindle that was not made for one, or gives you a blank to finish yourself. Morse-taper drills and reamers, Jacobs-taper drill chucks, HSK-C shank tools, screw-in milling cutters, and stock for making specials.

The trade is always the same, and it is worth stating plainly on an HSK page in particular: an adapter adds a joint, and a joint gives back some of what you bought HSK for. The face-contact interface at the spindle is unaffected, but the second interface — adapter to tool — has its own run-out and its own compliance, and the two add rather than cancel. For drilling, reaming and tapping that is usually fine. For a finishing cut it usually is not, and an integral holder in the right interface is cheaper over the life of the job.

The families

MTA / MTB Morse taper adapters, MT1–MT5: MTA retains by tang, MTB by drawbar. Use the drawbar version where the machine allows it — a tang can let the taper creep under a hard-pulling drill.

APU and CPU drill chuck holders, Ø1–16 mm, for keyless and precision drill chucks.

TC quick-change tapping chucks with length compensation, so the tap advances at its own pitch rather than being driven by the Z feed. Still worth having on blind holes and small taps even on a machine with rigid tapping.

SOM and M screw-in milling cutter holders, M8–M16, in A lengths from 51 to 179 mm for reaching into pockets.

MOD runout-adjustable flange adapters — the one adapter family whose added joint can be dialled true after assembly instead of simply accepted. If you must adapt, adapt with these.

HSK-C sleeves to run HSK-C shank tooling in an HSK-A spindle, UM adjustable tool holders, boring bar blanks Ø50–120 mm for grinding your own specials, and ATC alignment tools — gauges for setting the tool-change arm to the spindle, not cutting tools.

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.

Morse Taper Adapter with Tang — 16 article numbers

Article no.	MT. NO.	D	L
HSK50AQMTA1Q100	1	25	100
HSK50AQMTA2Q120	2	32	120
HSK50AQMTA3Q140	3	40	140
HSK63AQMTA1Q100	1	25	100
HSK63AQMTA2Q120	2	32	120
HSK63AQMTA3Q140	3	40	140
HSK63AQMTA4Q160	4	48	160
HSK80AQMTA1Q110	1	25	110
HSK80AQMTA2Q120	2	32	120
HSK80AQMTA3Q140	3	40	140
HSK80AQMTA4Q160	4	48	160
HSK100AQMTA1Q110	1	25	110
HSK100AQMTA2Q120	2	32	120
HSK100AQMTA3Q150	3	40	150
HSK100AQMTA4Q170	4	48	170
HSK100AQMTA5Q200	5	63	200

Morse Taper Adapter with Drawbar — 16 article numbers

Article no.	MT. NO.	D	L
HSK50AQMTB1Q100	1	25	100
HSK50AQMTB2Q120	2	32	120
HSK50AQMTB3Q140	3	40	140
HSK63AQMTB1Q100	1	25	100
HSK63AQMTB2Q120	2	32	120
HSK63AQMTB3Q140	3	40	140
HSK63AQMTB4Q160	4	48	160
HSK80AQMTB1Q110	1	25	110
HSK80AQMTB2Q120	2	32	120
HSK80AQMTB3Q150	3	40	150
HSK80AQMTB4Q170	4	48	170
HSK100AQMTB1Q110	1	25	110
HSK100AQMTB2Q120	2	32	120
HSK100AQMTB3Q150	3	40	150
HSK100AQMTB4Q170	4	48	170
HSK100AQMTB5Q200	5	63	200

Tool Holder Adapter Sleeve — 18 article numbers

Article no.	D1	D2	L
HSK50AQHSK50CQ80	50	55	80
HSK50AQHSK50CQ100	50	55	100
HSK63AQHSK63CQ100	63	70	100
HSK63AQHSK63CQ140	63	70	140
HSK80AQHSK80CQ120	80	87	120
HSK80AQHSK80CQ160	80	87	160
HSK100AQHSK100CQ140	100	110	140
HSK100AQHSK100CQ200	100	110	200
HSK50AQHSK32CQ60	32	37	60
HSK63AQHSK32CQ70	32	37	70
HSK63AQHSK40CQ80	40	45	80
HSK63AQHSK50CQ80	50	55	80
HSK80AQHSK40CQ80	40	45	80
HSK80AQHSK50CQ80	50	55	80
HSK80AQHSK63CQ100	63	70	100
HSK100AQHSK50CQ80	50	55	80
HSK100AQHSK63CQ100	63	70	100
HSK100AQHSK80CQ100	80	87	100

APU Drill Chuck Holder — 4 article numbers

Article no.	D	L	Capacity
HSK63AQAPU13Q130	48	130	1-13
HSK63AQAPU16Q140	53	140	3-16
HSK100AQAPU13Q140	48	140	1-13
HSK100AQAPU16Q150	53	150	3-16

APU Drill Chuck Holder — 5 article numbers

Article no.	D	D1	L	L1	Capacity
HSK63AQCPU10Q90	38	50	90	32	1-10
HSK63AQCPU13Q100	50	—	100	—	1-13
HSK63AQCPU16Q100	50	—	100	—	1-16
HSK100AQCPU13Q105	50	—	105	—	1-13
HSK100AQCPU16Q105	50	—	105	—	1-16

Quick Change Tapping Chuck — 6 article numbers

Article no.	d	D	L	T	C
HSK63AQTC312Q102	19	36	102	7.5	7.5
HSK63AQTC820Q140	31	53	140	12.5	12.5
HSK63AQTC1433Q210	48	78	210	22	22
HSK100AQTC312Q112	19	36	112	7.5	7.5
HSK100AQTC820Q148	31	53	148	12.5	12.5
HSK100AQTC1433Q210	48	78	210	22	22

Screw-in Milling Cutter Holder — 27 article numbers

Catalogue page 31 prints the End Mill Holder column header over this table (d / D / L / M / Screw Quantity / D). The correct symbols are M / d1 / d2 / A / L / D — verified against the dimension drawing, against page 32 which prints the same product correctly, and against the thread size and A length encoded in the article number.

Article no.	M	d1	d2	A	L	D
HSK63AQSOM08Q51 L=25	8	8.5	14.5	51	25	15
HSK63AQSOM08Q76 L=50	8	8.5	14.5	76	50	23
HSK63AQSOM08Q101 L=75	8	8.5	14.5	101	75	23
HSK63AQSOM10Q51 L=25	10	10.5	18	51	25	20
HSK63AQSOM10Q76 L=50	10	10.5	18	76	50	23
HSK63AQSOM10Q126 L=100	10	10.5	18	126	100	32
HSK63AQSOM10Q176 L=150	10	10.5	18	176	150	36.5
HSK63AQSOM12Q51 L=25	12	12.5	21	51	25	24
HSK63AQSOM12Q76 L=50	12	12.5	21	76	50	34
HSK63AQSOM12Q101 L=75	12	12.5	21	101	75	31
HSK63AQSOM12Q126 L=100	12	12.5	21	126	100	33
HSK63AQSOM12Q176 L=150	12	12.5	21	176	150	40
HSK63AQSOM16Q51 L=25	16	17	29	51	25	29
HSK63AQSOM16Q76 L=50	16	17	29	76	50	34
HSK63AQSOM16Q101 L=75	16	17	29	101	75	34
HSK63AQSOM16Q126 L=100	16	17	29	126	100	36
HSK63AQSOM16Q176 L=150	16	17	29	176	150	42.5
HSK100AQSOM08Q79 L=50	8	8.5	14.5	79	50	23
HSK100AQSOM10Q79 L=50	10	10.5	18	79	50	23
HSK100AQSOM10Q129 L=100	10	10.5	18	129	100	32
HSK100AQSOM10Q179 L=150	10	10.5	18	179	150	36.5
HSK100AQSOM12Q79 L=50	12	12.5	21	79	50	24
HSK100AQSOM12Q129 L=100	12	12.5	21	129	100	33
HSK100AQSOM12Q179 L=150	12	12.5	21	179	150	40
HSK100AQSOM16Q79 L=50	16	17	29	79	50	34
HSK100AQSOM16Q129 L=100	16	17	29	129	100	36
HSK100AQSOM16Q179 L=150	16	17	29	179	150	42.5

Screw-in Milling Cutter Holder — 14 article numbers

Article no.	M	d1	d2	A	L
HSK63AQM10Q126 L=100	10	10.5	18	126	100
HSK63AQM10Q176 L=150	10	10.5	18	176	150
HSK63AQM12Q101 L=75	12	12.5	21	101	75
HSK63AQM12Q126 L=100	12	12.5	21	126	100
HSK63AQM12Q176 L=150	12	12.5	21	176	150
HSK63AQM16Q101 L=75	16	17	29	101	75
HSK63AQM16Q126 L=100	16	17	29	126	100
HSK63AQM16Q176 L=150	16	17	29	176	150
HSK100AQM10Q129 L=100	10	10.5	18	129	100
HSK100AQM10Q179 L=150	10	10.5	18	179	150
HSK100AQM12Q129 L=100	12	12.5	21	129	100
HSK100AQM12Q179 L=150	12	12.5	21	179	150
HSK100AQM16Q129 L=100	16	17	29	129	100
HSK100AQM16Q179 L=150	16	17	29	179	150

Runout Adjustable Flange Adapter — 19 article numbers

Article no.	HSK-A	D	D1	D2	L	G	G1
HSK50AQMOD060Q060	50	60	30	44	60	M5	M8x1
HSK50AQMOD070Q060	50	70	35	53	60	M6	M8x1
HSK50AQMOD080Q060	50	80	40	63	60	M6	M8x1
HSK63AQMOD060Q060	63	60	30	44	60	M5	M8x1
HSK63AQMOD070Q060	63	70	35	53	60	M6	M8x1
HSK63AQMOD080Q060	63	80	40	63	60	M6	M8x1
HSK63AQMOD100Q065	63	100	50	79	65	M8	M10x1
HSK63AQMOD117Q065	63	117	60	96	65	M8	M10x1
HSK80AQMOD060Q050	80	60	30	44	50	M5	M8x1
HSK80AQMOD070Q060	80	70	35	53	60	M6	M8x1
HSK80AQMOD080Q060	80	80	40	63	60	M6	M8x1
HSK80AQMOD100Q065	80	100	50	79	65	M8	M10x1
HSK80AQMOD117Q065	80	117	60	96	65	M8	M10x1
HSK80AQMOD140Q075	80	140	80	119	75	M10	M10x1
HSK100AQMOD060Q055	100	60	30	44	55	M5	M8x1
HSK100AQMOD070Q055	100	70	35	53	55	M6	M8x1
HSK100AQMOD080Q055	100	80	40	63	55	M6	M8x1
HSK100AQMOD100Q065	100	100	50	79	65	M8	M10x1
HSK100AQMOD117Q065	100	117	60	96	65	M8	M10x1

UM Adjustable Tool Holder — 15 article numbers

The catalogue prints this table’s last column as M, but its value is the length that appears in the article number. Values are shown exactly as printed rather than relabelled; confirm the symbol assignment in writing at RFQ.

Article no.	D1	D2	D3	L
HSK50AQUM12Q85	12	28	44.5	85
HSK50AQUM16Q85	16	32	48	85
HSK50AQUM20Q95	20	40	53	95
HSK50AQUM25Q105	25	48	63	105
HSK50AQUM32Q110	32	52	63	110
HSK63AQUM12Q75	12	28	44.5	75
HSK63AQUM16Q75	16	32	48	75
HSK63AQUM20Q85	20	40	53	85
HSK63AQUM25Q105	25	48	63	105
HSK63AQUM32Q110	32	52	63	110
HSK100AQUM12Q80	12	28	44.5	80
HSK100AQUM16Q80	16	32	48	80
HSK100AQUM20Q95	20	40	53	95
HSK100AQUM25Q110	25	48	63	110
HSK100AQUM32Q115	32	52	63	115

Boring Bar Blank — 30 article numbers

Article no.	D1	D2
HSK50AQD050Q160	50	160
HSK50AQD065Q200	65	200
HSK63AQD065Q160	65	160
HSK63AQD065Q210	65	210
HSK63AQD065Q250	65	250
HSK63AQD065Q300	65	300
HSK63AQD080Q160	80	160
HSK63AQD080Q210	80	210
HSK63AQD080Q250	80	250
HSK63AQD080Q300	80	300
HSK63AQD100Q160	100	160
HSK63AQD100Q210	100	210
HSK63AQD100Q250	100	250
HSK63AQD100Q300	100	300
HSK63AQD120Q160	120	160
HSK63AQD120Q210	120	210
HSK63AQD120Q250	120	250
HSK63AQD120Q300	120	300
HSK100AQD080Q160	80	160
HSK100AQD080Q210	80	210
HSK100AQD080Q250	80	250
HSK100AQD080Q300	80	300
HSK100AQD100Q160	100	160
HSK100AQD100Q210	100	210
HSK100AQD100Q250	100	250
HSK100AQD100Q300	100	300
HSK100AQD120Q160	120	160
HSK100AQD120Q210	120	210
HSK100AQD120Q250	120	250
HSK100AQD120Q300	120	300

Alignment Tool for ATC Arm — 4 article numbers

Article no.	D1	D2	L	L1	L2	L3	M
HSK50AQATCQ25D	50	25	25	8	22	18	M6
HSK63AQATCQ30D	63	30	32	8	30	18	M8
HSK80AQATCQ35D	80	35	40	8	36	18	M10
HSK100AQATCQ40D	100	40	50	10	45	19	M10

Alignment Tool for ATC Arm — 2 article numbers

Article no.	D1	D2	L	L1	L2
HSK63AQATCQ20D	63	20	52	20	26
HSK100AQATCQ30D	100	30	70	20	29

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

Does an adapter undo the benefit of HSK?

Not at the spindle — that joint is unchanged. It adds a second joint further out, with its own run-out and flexibility. Judge it by the operation: fine for drilling and tapping, questionable for finishing.

MTA (tang) or MTB (drawbar)?

Drawbar wherever the machine supports it. A tang drive relies on the slot and can let the taper creep under a hard-pulling drill; a drawbar pulls it positively home.

Can I stack adapters?

Physically often yes, and it is almost always the wrong answer — errors add and stiffness drops twice. If you are stacking, the real fix is one purpose-made holder.

Are the boring bar blanks hardened?

They are supplied as blanks for the shop to finish. Confirm material and heat-treat condition with Mongtec at RFQ before planning a grinding operation.