SK (ISO) Shrink Fit Holders – SK30, SK40 and SK50 (DIN 69871)

A shrink fit holder clamps h6 carbide tool shanks by thermal shrink fit, loaded with a heat shrink machine. PTP makes them with an SK (ISO) shank (DIN 69871 / ISO 7388-1) in SK30, SK40 and SK50: bores Ø6–32 mm, gauge lengths 80–110 mm, 28 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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Shrink Fit Holders, SK (ISO) shank: technical drawing with dimensions — Shrink Fit Holders with a SK (ISO) shank, from the PTP catalogue. Click to open it full size.

All 28 SK (ISO) shrink fit holders

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

SK30 shrink fit holders: 8 ordering codes

Ordering code	Bore Ø (D)	Gauge Length (GPL)	d	C	Screw Thread (G)	L	GPL Long
47ISO30SFH0680	6 mm	80 mm	21 mm	27 mm	M5	36 mm	–
47ISO30SFH0880	8 mm	80 mm	21 mm	27 mm	M6	36 mm	–
47ISO30SFH1080	10 mm	80 mm	24 mm	32 mm	M8	42 mm	–
47ISO30SFH1280	12 mm	80 mm	24 mm	32 mm	M10	42 mm	–
47ISO30SFH1480	14 mm	80 mm	27 mm	34 mm	M10	50 mm	120, 160 mm
47ISO30SFH1680	16 mm	80 mm	27 mm	34 mm	M12	50 mm	–
47ISO30SFH1880	18 mm	80 mm	33 mm	42 mm	M12	52 mm	–
47ISO30SFH2080	20 mm	80 mm	33 mm	42 mm	M16	52 mm	–

SK40 shrink fit holders: 10 ordering codes

Ordering code	Bore Ø (D)	Gauge Length (GPL)	d	C	Screw Thread (G)	L	GPL Long
47ISO40SFH0690	6 mm	90 mm	21 mm	27 mm	M5	36 mm	160, 220 mm
47ISO40SFH0890	8 mm	90 mm	21 mm	27 mm	M6	36 mm	160, 220 mm
47ISO40SFH1090	10 mm	90 mm	24 mm	32 mm	M8	42 mm	160, 220 mm
47ISO40SFH1290	12 mm	90 mm	24 mm	32 mm	M10	42 mm	160, 220 mm
47ISO40SFH1490	14 mm	90 mm	27 mm	34 mm	M10	50 mm	160, 220 mm
47ISO40SFH1690	16 mm	90 mm	27 mm	34 mm	M12	50 mm	160, 220 mm
47ISO40SFH1890	18 mm	90 mm	33 mm	42 mm	M12	52 mm	160, 220 mm
47ISO40SFH2090	20 mm	90 mm	33 mm	42 mm	M16	52 mm	160, 220 mm
47ISO40SFH25100	25 mm	100 mm	44 mm	53 mm	M16	58 mm	–
47ISO40SFH32100	32 mm	100 mm	44 mm	53 mm	M16	58 mm	–

SK50 shrink fit holders: 10 ordering codes

Ordering code	Bore Ø (D)	Gauge Length (GPL)	d	C	Screw Thread (G)	L	GPL Long
47ISO50SFH06100	6 mm	100 mm	21 mm	27 mm	M5	36 mm	160, 220 mm
47ISO50SFH08100	8 mm	100 mm	21 mm	27 mm	M6	36 mm	160, 220 mm
47ISO50SFH10100	10 mm	100 mm	24 mm	32 mm	M8	42 mm	160, 220 mm
47ISO50SFH12100	12 mm	100 mm	24 mm	32 mm	M10	42 mm	160, 220 mm
47ISO50SFH14100	14 mm	100 mm	27 mm	34 mm	M10	50 mm	160, 220 mm
47ISO50SFH16100	16 mm	100 mm	27 mm	34 mm	M12	50 mm	160, 220 mm
47ISO50SFH18100	18 mm	100 mm	33 mm	42 mm	M12	52 mm	160, 220 mm
47ISO50SFH20100	20 mm	100 mm	33 mm	42 mm	M16	52 mm	160, 220 mm
47ISO50SFH25110	25 mm	110 mm	44 mm	53 mm	M16	58 mm	–
47ISO50SFH32110	32 mm	110 mm	44 mm	53 mm	M16	58 mm	–

Questions about SK (ISO) shrink fit holders

Which pull stud does an SK shrink fit holder 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 shrink fit holder?

A heat shrink machine, to load and unload the h6 carbide tool shank.