Shank versions for milling machines and machining centres The extremely high tool quality protects the machine spindle and extends the service li

Shank versions for milling machines and machining centres The extremely high tool quality protects the machine spindle and extends the service life of the tools. Tolerance is tighter than required by DIN Taper accuracy to AT 3 (max. 3 nm), surface roughness Rz < 0.001 mm. Note See page 631 for information on hollow shank interfaces (HSK). Shanks for NC machines and machining centres Form A without through hole Form AD with through hole for central coolant supply Form B for lateral coolant supply via the tool collar Pull studs to DIN 69872 or ISO 7388/II type B or with snap ring groove. Pull studs to JIS standard. Shanks for conventional milling machines and NC machines DIN 69871 Part 1 JIS B 6339 (Japanese Standard) (previously MAS-BT) SK30 SK40 SK50 11 47.80 68.40 101.75 d 1 31.75 44.45 69.85 d 6 50.00 63.55 97.50 d 8 45.00 50.00 80.00 f 2 35.00 35.00 35.00 f 3 19.10 19.10 19.10 a 3.20 3.20 3.20 9 M 12 M 16 M 24 SK30 SK40 SK50 11 48.40 65.40 101.80 d 1 31.75 44.45 69.85 d 6 46.00 63.00 100.00 f 3 22.00 27.00 38.00 a 2.00 2.00 3.00 9 M 12 M 16 M 24 IQS MT 3, MT 4 and MT 5 with Morse taper and internal draw thread. DIN 2207 BT/SK 40 for all Deckel machines with external buttress threads. MK3 MK4 MK5 12 86 109 136 14 18 23 28 d 1 23.825 31.267 44.399 d 2 36 43 60 9 M 12 M 16 M 20 Deckel Drill chuck spigots DIN 238 (June 1962 issue) BT/SK 30 and BT/SK 50 with internal draw thread BT/SK 30 - in stock at the manufacturer. DIN 2080 SK40 11 120 12 30 d 1 44.450 d 2 58 9 5 20X2 BT/SK 40 With internal thread with hand clamping and snap ring groove for automatic clamping (e. g. Maho, Deckel, Mikron). ii 5 oJE 33 U , 13 SK30 SK 50 ii 68.40 126.80 12 50.00 105.00 d 1 31.75 69.85 d 8 50.00 97.50 f 9.50 15.10 g M 12 M 24 Similar to DIN 2080 with snap ring groove SK40 11 93.40 ±0.15 12 82.00 ±0.15 13 7 d 1 44.45 d 2 21.10-0.10 d 3 25.00 - 0.08 9 M 16 Spigot Size D mm d mm L mm For combination with Morse taper For drill chucks with clamping range Largest clamping 0 of the drill chuck B6 6.350 5.85 10.00 MK0-MK2 s 3 mm BIO 10.094 9.40 14.50 MK0 - MK2 3 mm - 4 mm 8 B12 12.065 11.10 18.50 MK0-MK2 6 mm - 8 mm 10 B16 15.733 14.50 24.00 MK1 - MK3 10 mm - 13 mm 16 B18'> 17.431 16.20 32.00 MK1 - MK3 16 mm 16 B22 21.793 19.80 40.50 MK2 - MK4 20 mm 20 B24 23.825 21.30 50.50 MK3-MK5 26 mm - 32 mm 26 1) Shortened version jSaBaa d HOLEX Pull-studs Material Material condition Machining condition Advantages GARANT chromium-nickel steel GARANT No. 308605/8615 18CrNiMo7 HOLEX 16 MnCr5 - High hardness (60 HRC) - High tensile strength -Tough core - High radial run-out accuracy/ axial run-out accuracy - Functional faces ground -Thread true to gauge - Shock-resistant - Reduced risk of breakage - Prevents tool skewing - Good surface finish of components m Main catalogue Hoffmann Group 46 599