Every item on this page exists to connect something to a BT spindle that was not made for one — a taper-shank drill, a Jacobs-taper chuck, an HSK tool, a screw-in milling cutter — or to give you a blank to make something yourself.
The trade is always the same. An adapter adds a joint. A joint costs rigidity and adds run-out, and the errors of the two halves add rather than cancel. For a drill, a reamer, or a tapping operation that is usually fine. For a finishing cut where surface finish or tolerance is the point, it usually is not, and an integral holder in the correct interface is the cheaper answer over the life of the job.
MTA / MTB Morse taper adapters take taper-shank drills and reamers: MTA retains by tang, MTB by drawbar. Use the drawbar version wherever the machine allows it — a tang relies on friction plus a drive slot and can slip on a hard-pulling drill.
APU and CPU drill chuck holders carry keyless and precision drill chucks, Ø1–16 mm. B-series drill chuck adapters present a plain Jacobs taper (B12–B22) for mounting your own chuck.
TC quick-change tapping chucks with length compensation let the tap advance at its own pitch instead of being driven by the Z-axis feed. On a machine without rigid tapping this is not optional — it is the difference between a thread and a broken tap.
SOM / M screw-in milling cutter holders carry cutters that thread directly onto the holder nose, in a range of A lengths for reaching into pockets.
MOD runout-adjustable flange adapters and the flange-to-HSK-C sleeves are the adjustable family: the joint can be dialled true after assembly rather than accepted as found.
D-series boring bar blanks are unfinished stock on a BT taper for shops that grind or bore their own specials. ATC alignment tools are gauges, not cutting tools — they set the tool-change arm to the spindle.
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 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.
| Article no. | D | L | Capacity |
|---|---|---|---|
| BT30QAPU08Q80 | 36 | 80 | 1-8 |
| BT30QAPU13Q110 | 48 | 110 | 1-13 |
| BT40QAPU08Q85 | 36 | 85 | 1-8 |
| BT40QAPU13Q105 | 48 | 105 | 1-13 |
| BT40QAPU16Q110 | 53 | 110 | 3-16 |
| BT50QAPU08Q90 | 36 | 90 | 1-8 |
| BT50QAPU13Q105 | 48 | 105 | 1-13 |
| BT50QAPU16Q115 | 53 | 115 | 3-16 |
| Article no. | D | D1 | D2 | L | L1 | L2 |
|---|---|---|---|---|---|---|
| BT30QATCQ18D | 31.75 | 46 | 18 | 50.4 | 2 | 20 |
| BT40QATCQ20D | 44.45 | 63 | 20 | 67.4 | 2 | 25 |
| BT50QATCQ28D | 69.85 | 100 | 28 | 104.8 | 3 | 35 |
| Article no. | D | D1 |
|---|---|---|
| BT30QD50Q160 | 50 | 160 |
| BT40QD63Q160 | 63 | 160 |
| BT40QD63Q250 | 63 | 250 |
| BT50QD100Q160 | 100 | 160 |
| BT50QD100Q250 | 100 | 250 |
| BT30Q32Q300 | 32 | 300 |
| BT40Q40Q300 | 40 | 300 |
| BT50Q50Q300 | 50 | 300 |
| Article no. | D | L | L1 |
|---|---|---|---|
| BT30QB12Q25 | B12 | 25 | 18.5 |
| BT30QB16Q25 | B16 | 25 | 24 |
| BT40QB12Q32 | B12 | 32 | 18.5 |
| BT40QB16Q32 | B16 | 32 | 24 |
| BT40QB18Q32 | B18 | 32 | 32 |
| BT40QB22Q32 | B22 | 32 | 40.5 |
| BT50QB16Q45 | B16 | 45 | 24 |
| BT50QB18Q45 | B18 | 45 | 32 |
| BT50QB22Q45 | B22 | 45 | 40.5 |
| Article no. | MT.NO. | D | L |
|---|---|---|---|
| BT40QMTB1Q50 | 1 | 25 | 50 |
| BT40QMTB2Q50 | 2 | 32 | 50 |
| BT40QMTB3Q70 | 3 | 40 | 70 |
| BT40QMTB4Q95 | 4 | 48 | 95 |
| BT50QMTB1Q45 | 1 | 25 | 45 |
| BT50QMTB2Q60 | 2 | 32 | 60 |
| BT50QMTB3Q65 | 3 | 40 | 65 |
| BT50QMTB4Q70 | 4 | 48 | 70 |
| BT50QMTB5Q120 | 5 | 63 | 120 |
| Article no. | MT.NO. | D | L |
|---|---|---|---|
| BT30QMTA1Q45 | 1 | 25 | 45 |
| BT30QMTA2Q60 | 2 | 32 | 60 |
| BT30QMTA3Q75 | 3 | 40 | 75 |
| BT40QMTA1Q50 | 1 | 25 | 50 |
| BT40QMTA2Q50 | 2 | 32 | 50 |
| BT40QMTA3Q70 | 3 | 40 | 70 |
| BT40QMTA4Q95 | 4 | 48 | 95 |
| BT50QMTA1Q45 | 1 | 25 | 45 |
| BT50QMTA2Q60 | 2 | 32 | 60 |
| BT50QMTA3Q65 | 3 | 40 | 65 |
| BT50QMTA3Q180 | 3 | 40 | 180 |
| BT50QMTA4Q95 | 4 | 48 | 95 |
| BT50QMTA4Q180 | 4 | 48 | 180 |
| BT50QMTA5Q105 | 5 | 63 | 105 |
| Article no. | D | D1 | L | L1 | Capacity |
|---|---|---|---|---|---|
| BT30QCPU10Q80 | 38 | 50 | 80 | 26 | 1-10 |
| BT40QCPU10Q80 | 38 | 50 | 80 | 21 | 1-10 |
| BT40QCPU13Q90 | 50 | - | 90 | - | 1-13 |
| BT40QCPU16Q90 | 50 | - | 90 | - | 1-16 |
| BT50QCPU13Q100 | 50 | - | 100 | - | 1-13 |
| BT50QCPU16Q100 | 50 | - | 100 | - | 1-16 |
| Article no. | d | D | L | T | C |
|---|---|---|---|---|---|
| BT30QTC312Q70 | 19 | 38 | 70 | 7.5 | 7.5 |
| BT30QTC820Q95 | 31 | 54 | 95 | 12.5 | 12.5 |
| BT40QTC312Q65 | 19 | 38 | 65 | 7.5 | 7.5 |
| BT40QTC820Q93 | 31 | 53 | 93 | 12.5 | 12.5 |
| BT40QTC1433Q166 | 48 | 78 | 166 | 22 | 22 |
| BT50QTC312Q100 | 19 | 38 | 100 | 7.5 | 7.5 |
| BT50QTC820Q100 | 31 | 53 | 100 | 12.5 | 12.5 |
| BT50QTC1433Q142 | 48 | 78 | 142 | 22 | 22 |
| Article no. | D | D1 | D2 | L | G | G1 |
|---|---|---|---|---|---|---|
| BT30QMOD060Q050 | 60 | 30 | 44 | 50 | M5 | M8x1 |
| BT30QMOD070Q050 | 70 | 35 | 53 | 50 | M6 | M8x1 |
| BT40QMOD060Q050 | 60 | 30 | 44 | 50 | M5 | M8x1 |
| BT40QMOD070Q050 | 70 | 35 | 53 | 50 | M6 | M8x1 |
| BT40QMOD080Q050 | 80 | 40 | 63 | 50 | M6 | M8x1 |
| BT40QMOD100Q070 | 100 | 50 | 79 | 70 | M8 | M10x1 |
| BT50QMOD060Q070 | 60 | 30 | 44 | 70 | M5 | M8x1 |
| BT50QMOD070Q070 | 70 | 35 | 53 | 70 | M6 | M8x1 |
| BT50QMOD080Q070 | 80 | 40 | 63 | 70 | M6 | M8x1 |
| BT50QMOD100Q070 | 100 | 50 | 79 | 70 | M8 | M10x1 |
| BT50QMOD117Q080 | 117 | 60 | 96 | 80 | M8 | M10x1 |
| BT50QMOD140Q080 | 140 | 80 | 119 | 80 | M10 | M10x1 |
| Article no. | D | HSK-C | d1 | L1 | L2 |
|---|---|---|---|---|---|
| MOD070QHSK40CQ30 | 70 | 40 | 45 | 30 | 15 |
| MOD100QHSK63CQ43 | 100 | 63 | 70 | 43 | 22 |
| MOD140QHSK100CQ70 | 140 | 100 | 110 | 70 | 42 |
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 |
|---|---|---|---|---|---|---|
| BT50QSOM12Q88 L=50 | 12 | 12.5 | 21 | 88 | 50 | 24 |
| BT50QSOM12Q138 L=100 | 12 | 12.5 | 21 | 138 | 100 | 33 |
| BT50QSOM12Q188 L=150 | 12 | 12.5 | 21 | 188 | 150 | 40 |
| BT50QSOM16Q88 L=50 | 16 | 17 | 29 | 88 | 50 | 34 |
| BT50QSOM16Q138 L=100 | 16 | 17 | 29 | 138 | 100 | 36 |
| BT50QSOM16Q188 L=150 | 16 | 17 | 29 | 188 | 150 | 42.5 |
| BT40QSOM08Q52 L=25 | 8 | 8.5 | 14.5 | 52 | 25 | 15 |
| BT40QSOM08Q77 L=50 | 8 | 8.5 | 14.5 | 77 | 50 | 23 |
| BT40QSOM08Q102 L=75 | 8 | 8.5 | 14.5 | 102 | 75 | 23 |
| BT40QSOM08Q127 L=100 | 8 | 8.5 | 14.5 | 127 | 100 | 25 |
| BT40QSOM10Q32 L=5 | 10 | 10.5 | 18 | 32 | 5 | 18 |
| BT40QSOM10Q52 L=25 | 10 | 10.5 | 18 | 52 | 25 | 20 |
| BT40QSOM10Q77 L=50 | 10 | 10.5 | 18 | 77 | 50 | 23 |
| BT40QSOM10Q102 L=75 | 10 | 10.5 | 18 | 102 | 75 | 28 |
| BT40QSOM10Q127 L=100 | 10 | 10.5 | 18 | 127 | 100 | 32 |
| BT40QSOM10Q177 L=150 | 10 | 10.5 | 18 | 177 | 150 | 36.5 |
| BT40QSOM12Q32 L=5 | 12 | 12.5 | 21 | 32 | 5 | 21 |
| BT40QSOM12Q52 L=25 | 12 | 12.5 | 21 | 52 | 25 | 24 |
| BT40QSOM12Q77 L=50 | 12 | 12.5 | 21 | 77 | 50 | 24 |
| BT40QSOM12Q102 L=75 | 12 | 12.5 | 21 | 102 | 75 | 31 |
| BT40QSOM12Q127 L=100 | 12 | 12.5 | 21 | 127 | 100 | 31 |
| BT40QSOM12Q152 L=125 | 12 | 12.5 | 21 | 152 | 125 | 36 |
| BT40QSOM12Q177 L=150 | 12 | 12.5 | 21 | 177 | 150 | 38 |
| BT40QSOM16Q32 L=5 | 16 | 17 | 29 | 32 | 5 | 29 |
| BT40QSOM16Q52 L=25 | 16 | 17 | 29 | 52 | 25 | 29 |
| BT40QSOM16Q77 L=50 | 16 | 17 | 29 | 77 | 50 | 34 |
| BT40QSOM16Q102 L=75 | 16 | 17 | 29 | 102 | 75 | 34 |
| BT40QSOM16Q127 L=100 | 16 | 17 | 29 | 127 | 100 | 36 |
| BT40QSOM16Q152 L=125 | 16 | 17 | 29 | 152 | 125 | 40 |
| BT40QSOM16Q177 L=150 | 16 | 17 | 29 | 177 | 150 | 42.5 |
| BT50QSOM08Q88 L=50 | 8 | 8.5 | 14.5 | 88 | 50 | 23 |
| BT50QSOM08Q138 L=100 | 8 | 8.5 | 14.5 | 138 | 100 | 25 |
| BT50QSOM08Q188 L=150 | 8 | 8.5 | 14.5 | 188 | 150 | 30 |
| BT50QSOM10Q88 L=50 | 10 | 10.5 | 18 | 88 | 50 | 23 |
| BT50QSOM10Q138 L=100 | 10 | 10.5 | 18 | 138 | 100 | 32 |
| BT50QSOM10Q188 L=150 | 10 | 10.5 | 18 | 188 | 150 | 36.5 |
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 |
|---|---|---|---|---|---|
| BT40QM10Q102 L=75 | 10 | 10.5 | 18 | 102 | 75 |
| BT40QM10Q127 L=100 | 10 | 10.5 | 18 | 127 | 100 |
| BT40QM10Q177 L=150 | 10 | 10.5 | 18 | 177 | 150 |
| BT40QM12Q102 L=75 | 12 | 12.5 | 21 | 102 | 75 |
| BT40QM12Q127 L=100 | 12 | 12.5 | 21 | 127 | 100 |
| BT40QM12Q152 L=125 | 12 | 12.5 | 21 | 152 | 125 |
| BT40QM12Q177 L=150 | 12 | 12.5 | 21 | 177 | 150 |
| BT40QM16Q102 L=75 | 16 | 17 | 29 | 102 | 75 |
| BT40QM16Q127 L=100 | 16 | 17 | 29 | 127 | 100 |
| BT40QM16Q152 L=125 | 16 | 17 | 29 | 152 | 125 |
| BT40QM16Q177 L=150 | 16 | 17 | 29 | 177 | 150 |
| BT50QM10Q138 L=100 | 10 | 10.5 | 18 | 138 | 100 |
| BT50QM10Q188 L=150 | 10 | 10.5 | 18 | 188 | 150 |
| BT50QM12Q138 L=100 | 12 | 12.5 | 21 | 138 | 100 |
| BT50QM12Q188 L=150 | 12 | 12.5 | 21 | 188 | 150 |
| BT50QM16Q138 L=100 | 16 | 17 | 29 | 138 | 100 |
| BT50QM16Q188 L=150 | 16 | 17 | 29 | 188 | 150 |
| Article no. | D | L |
|---|---|---|
| BT40QBT30Q60 | 63 | 60 |
| BT40QBT40Q100 | 63 | 100 |
| BT50QBT40Q70 | 70 | 70 |
| BT50QBT50Q120 | 97 | 120 |
The catalogue prints this table’s first column header as MT.NO., carried over from the table above it. Its values are the HSK-C size and match the article number, so the column is shown here as HSK-C.
| Article no. | HSK-C | D | L |
|---|---|---|---|
| BT30QHSK32CQ40 | 32 | 37 | 40 |
| BT30QHSK40CQ40 | 40 | 45 | 40 |
| BT40QHSK32CQ40 | 32 | 37 | 40 |
| BT40QHSK40CQ40 | 40 | 45 | 40 |
| BT40QHSK50CQ50 | 50 | 55 | 50 |
| BT40QHSK63CQ70 | 63 | 70 | 70 |
| BT50QHSK32CQ50 | 32 | 37 | 50 |
| BT50QHSK40CQ50 | 40 | 45 | 50 |
| BT50QHSK50CQ60 | 50 | 55 | 60 |
| BT50QHSK63CQ60 | 63 | 70 | 60 |
| BT50QHSK80CQ60 | 80 | 87 | 60 |
| BT50QHSK100CQ90 | 100 | 110 | 90 |
The catalogue prints this table’s last column as M, but its value is the length that appears in the article number, and the column printed L is a shorter dimension. Values are shown exactly as printed rather than relabelled; confirm the symbol assignment in writing at RFQ.
| Article no. | d | D | L | M |
|---|---|---|---|---|
| BT30QUM12Q65 | 12 | 28 | 44.5 | 65 |
| BT30QUM16Q75 | 16 | 32 | 48 | 75 |
| BT30QUM20Q85 | 20 | 40 | 53 | 85 |
| BT30QUM25Q95 | 25 | 48 | 63 | 95 |
| BT30QUM32Q100 | 32 | 52 | 63 | 100 |
| BT40QUM12Q70 | 12 | 28 | 44.5 | 70 |
| BT40QUM16Q70 | 16 | 32 | 48 | 70 |
| BT40QUM20Q80 | 20 | 40 | 53 | 80 |
| BT40QUM25Q100 | 25 | 48 | 63 | 100 |
| BT40QUM32Q95 | 32 | 52 | 63 | 95 |
| BT50QUM12Q80 | 12 | 28 | 44.5 | 80 |
| BT50QUM16Q85 | 16 | 32 | 48 | 85 |
| BT50QUM20Q90 | 20 | 40 | 53 | 90 |
| BT50QUM25Q105 | 25 | 48 | 63 | 105 |
| BT50QUM32Q105 | 32 | 52 | 63 | 105 |
Source: Mongtec BT·BBT Tooling System catalogue, Ver 2026.
Drawbar wherever the machine supports it. A tang drive relies on the slot in the spindle and can let the taper creep under a hard-pulling drill; a drawbar pulls the taper positively into the socket.
Usually not for through-holes in stable material, which is what rigid tapping is for. A compensating chuck still earns its place on blind holes, on small taps, and on any machine whose spindle-to-feed synchronisation you do not fully trust.
They are supplied as blanks for the shop to finish. Confirm the material and heat-treat condition with Mongtec at RFQ before planning a grinding operation on one.
The catalogue prints a few column symbols inconsistently between tables. Where that happens the note under the table says so, and the value is shown exactly as the catalogue prints it rather than silently relabelled. Confirm the symbol assignment in writing at RFQ.