SK (ISO) Threaded Mill Adapters – SK30, SK40 and SK50 (DIN 69871)

A threaded mill adapter drives milling cutters with a threaded (screw-in) shank. PTP makes them with an SK (ISO) shank (DIN 69871 / ISO 7388-1) in SK30, SK40 and SK50: M6 to M16 threads, gauge lengths 60–295 mm, 33 ordering codes in all. They are pulled into the spindle by DIN 69872 pull studs: M12 on SK30, M16 on SK40 and M24 on SK50. Taper AT3 or better, TIR 0.005 mm max, balanced G2.5 @ 25,000 rpm.

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Threaded Mill Adapters, SK (ISO) shank: technical drawing with dimensions — Threaded Mill Adapters with a SK (ISO) shank, from the PTP catalogue. Click to open it full size.

All 33 SK (ISO) threaded mill adapters

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

SK30 threaded mill adapters: 6 ordering codes

Ordering code	Thread	Bore Ø (d)	Gauge Length (GPL)	D1	C
46ISO30TMA0660	M6	6.5 mm	60 mm	11 mm	14.5 mm
46ISO30TMA0685	M6	6.5 mm	85 mm	11 mm	16 mm
46ISO30TMA0860	M8	8.5 mm	60 mm	13.5 mm	18.5 mm
46ISO30TMA0885	M8	8.5 mm	85 mm	13.5 mm	20 mm
46ISO30TMA1060	M10	10.5 mm	60 mm	18.5 mm	23 mm
46ISO30TMA1085	M10	10.5 mm	85 mm	18.5 mm	24.5 mm

SK40 threaded mill adapters: 19 ordering codes

Ordering code	Thread	Bore Ø (d)	Gauge Length (GPL)	D1	C
46ISO40TMA0660	M6	6.5 mm	60 mm	11 mm	14.5 mm
46ISO40TMA0685	M6	6.5 mm	85 mm	11 mm	16 mm
46ISO40TMA0860	M8	8.5 mm	60 mm	13.5 mm	18.5 mm
46ISO40TMA0885	M8	8.5 mm	85 mm	13.5 mm	20 mm
46ISO40TMA08110	M8	8.5 mm	110 mm	13.5 mm	21.5 mm
46ISO40TMA1060	M10	10.5 mm	60 mm	18.5 mm	23 mm
46ISO40TMA1085	M10	10.5 mm	85 mm	18.5 mm	24.5 mm
46ISO40TMA10135	M10	10.5 mm	135 mm	18.5 mm	27.5 mm
46ISO40TMA10185	M10	10.5 mm	185 mm	18.5 mm	37 mm
46ISO40TMA1260	M12	12.5 mm	60 mm	23 mm	28.5 mm
46ISO40TMA1285	M12	12.5 mm	85 mm	23 mm	30 mm
46ISO40TMA12110	M12	12.5 mm	110 mm	23 mm	31.5 mm
46ISO40TMA12135	M12	12.5 mm	135 mm	23 mm	33 mm
46ISO40TMA12185	M12	12.5 mm	185 mm	23 mm	42.5 mm
46ISO40TMA1660	M16	17 mm	60 mm	30 mm	35.5 mm
46ISO40TMA1685	M16	17 mm	85 mm	30 mm	37 mm
46ISO40TMA16110	M16	17 mm	110 mm	30 mm	38.5 mm
46ISO40TMA16135	M16	17 mm	135 mm	30 mm	40.5 mm
46ISO40TMA16185	M16	17 mm	185 mm	30 mm	50 mm

SK50 threaded mill adapters: 8 ordering codes

Ordering code	Thread	Bore Ø (d)	Gauge Length (GPL)	D1	C
46ISO50TMA1295	M12	12.5 mm	95 mm	23 mm	35 mm
46ISO50TMA12145	M12	12.5 mm	145 mm	23 mm	41 mm
46ISO50TMA12195	M12	12.5 mm	195 mm	23 mm	42.5 mm
46ISO50TMA1695	M16	17 mm	95 mm	30 mm	42.5 mm
46ISO50TMA16145	M16	17 mm	145 mm	30 mm	49 mm
46ISO50TMA16195	M16	17 mm	195 mm	30 mm	50 mm
46ISO50TMA16245	M16	17 mm	245 mm	30 mm	55 mm
46ISO50TMA16295	M16	17 mm	295 mm	30 mm	59.5 mm

Questions about SK (ISO) threaded mill adapters

Which pull stud does an SK threaded mill adapter take?

The pull stud of its taper size: M12 on SK30, M16 on SK40 and M24 on SK50. Use a DIN 69872 pull stud with a 15° head.

SK30 pull studs SK40 pull studs SK50 pull studs

What goes with an SK threaded mill adapter?

Milling cutters with a threaded (screw-in) shank: M6, M8, M10, M12 and M16.