BT Hydraulic Chucks – BT30, BT40 and BT50 (MAS 403)

A hydraulic chuck clamps the tool shank through a hydraulic membrane for finishing, drilling and reaming. PTP makes them with a BT shank (MAS 403 / JIS B6339, ISO 7388-2 type J) in BT30, BT40 and BT50: bores Ø6–40 mm, gauge lengths 75–125 mm, 29 ordering codes in all. They are pulled into the spindle by MAS-BT or JIS B6339 pull studs: M12 on BT30, M16 on BT40 and M24 on BT50. Taper AT3 or better, TIR 0.003 mm max.

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Hydraulic Chucks, BT shank: technical drawing with dimensions — Hydraulic Chucks with a BT shank, from the PTP catalogue. Click to open it full size.

All 29 BT hydraulic chucks (HYD)

One table per taper size. Every ordering code opens its own page with its dimensions (mm).

BT30 hydraulic chucks (HYD): 8 ordering codes

Ordering code	Bore Ø (d)	Gauge Length (GPL)	C	Screw Thread	L
47BT30HYD0675	6 mm	75 mm	26 mm	M5	23 mm
47BT30HYD0875	8 mm	75 mm	28 mm	M6	24 mm
47BT30HYD1080	10 mm	80 mm	30 mm	M8	30 mm
47BT30HYD1285	12 mm	85 mm	32 mm	M10	36 mm
47BT30HYD14100	14 mm	100 mm	34 mm	M10	40 mm
47BT30HYD16100	16 mm	100 mm	38 mm	M12	40 mm
47BT30HYD18100	18 mm	100 mm	40 mm	M12	43 mm
47BT30HYD20100	20 mm	100 mm	42 mm	M16	43 mm

BT40 hydraulic chucks (HYD): 10 ordering codes

Ordering code	Bore Ø (d)	Gauge Length (GPL)	C	Screw Thread	L
47BT40HYD0680	6 mm	80 mm	26 mm	M5	23 mm
47BT40HYD0880	8 mm	80 mm	28 mm	M6	24 mm
47BT40HYD1080	10 mm	80 mm	30 mm	M8	30 mm
47BT40HYD1290	12 mm	90 mm	32 mm	M10	36 mm
47BT40HYD1490	14 mm	90 mm	34 mm	M10	40 mm
47BT40HYD1690	16 mm	90 mm	38 mm	M12	40 mm
47BT40HYD1895	18 mm	95 mm	40 mm	M12	43 mm
47BT40HYD2095	20 mm	95 mm	42 mm	M16	43 mm
47BT40HYD25105	25 mm	105 mm	53 mm	M16	46 mm
47BT40HYD32110	32 mm	110 mm	60 mm	M16	51 mm

BT50 hydraulic chucks (HYD): 11 ordering codes

Ordering code	Bore Ø (d)	Gauge Length (GPL)	C	Screw Thread	L
47BT50HYD0690	6 mm	90 mm	42 mm	M10	23 mm
47BT50HYD0890	8 mm	90 mm	50 mm	M16	24 mm
47BT50HYD1095	10 mm	95 mm	50 mm	M16	30 mm
47BT50HYD12100	12 mm	100 mm	50 mm	M16	36 mm
47BT50HYD14100	14 mm	100 mm	50 mm	M16	40 mm
47BT50HYD16105	16 mm	105 mm	50 mm	M16	40 mm
47BT50HYD18105	18 mm	105 mm	50 mm	M16	43 mm
47BT50HYD20105	20 mm	105 mm	50 mm	M16	43 mm
47BT50HYD25115	25 mm	115 mm	50 mm	M16	46 mm
47BT50HYD32120	32 mm	120 mm	50 mm	M16	51 mm
47BT50HYD40125	40 mm	125 mm	72 mm	M16	57 mm

Questions about BT hydraulic chucks (HYD)

Which pull stud does a BT hydraulic chuck take?

The pull stud of its taper size: M12 on BT30, M16 on BT40 and M24 on BT50. Use a MAS-BT pull stud with the head angle your drawbar takes (45°, 60° or 90°), or a JIS B6339 stud with a 15° head (BT40 and BT50).

BT30 pull studs BT40 pull studs BT50 pull studs

What goes with a BT hydraulic chuck?

Hydro intermediate sleeves (HIS) reduce the Ø12, 20 and 32 mm bores to smaller tool shanks, Ø3–25 mm.

Hydro intermediate sleeves (HIS)