243 Jaws and Accessories A B C1 C2 D1 D2 E G 133 82.563 61.9 104.8 14.288 13 15.9 M10 165 106.375 82.6 133.4 15.875 14 19.05 M12 210 139.719 111.1 171.4 17.462 16 23.8 M16 280 196.869 165.1 235 19.050 18 28.6 M20 380 285.775 247.6 330.2 20.638 19 34.9 M24 φC1 φB φC2 φA G φE 7°7′30″ G 5 6 8 11 15 JIS B 6109-1: 2005 Machine Tool - Lathe Spindle End and Chuck mounting dimensions Part 1: Extract "Mounting Short Taper" Note 1: C1 is Shown on A1 Spindle Nose Note 2: D1 is shown on A1 Spindle Nose and D2 is done on A2 one Code Spindle Nose Number Nose shape figure Nose dimension figure Spindle end Rear face of chuck (M22 for Former JIS) D1 or D2 Gps!npvoujoh!b!tipsu!ubqfs! divdl!up!mbuif!tqjoemf!foe ●About lathe spindle end Standards covering the lathe spindle end are stipulated in ISO, ASA, DIN, etc except JIS. Japan major lathe manufacturers manufacture the great majority of lathe spindle end parts at standards of JIS-A1, A2 (ISO-A1, A2). However, a part of lathe spindle end parts is manufactured at ASA-A1, A2. Although the spindle end dimensions according to each standard are the same, the dimensional tolerance of a face plate (chuck or back plate) varies by a few microns. When placing an order, establish contact with your agent or our company to advise a manufacturer name and type of a lathe used in a customer shop. Since the dimensional tolerance of spindle end face may vary by manufacturers, it is necessary to correct the taper of the chuck rear body. (Please understand that there is a fluctuation of a delivery date and a price.) Moreover, JN-RA types are standard and chuck mounting M bolts are packed together with the chuck. Since each chuck mounting bolt is manufactured at inch (UNIHI bolt or wit screw) by manufacturers, confer with our company. ●Mounting the short taper (direct type) chuck for spindle end The taper diameter of the short taper chuck for the spindle end is small slightly and the chuck has the some amount of interference (tolerance). A little gap occurs in mutual mounting end faces when the chuck is set. The chuck is closely touched by screwing mounting bolts. (The face having mounting bolt holes is the mounting face.) Tighten the chuck evenly by screwing bolts diagonally. When interference (tolerance) of the chuck is large or small, any gap may occur in diameter direction. In the former case, the chuck may be deformed at the time of chuck mounting. In the latter case, a gripping accuracy becomes low for increasing a mounting error. Similarly, the scroll chuck will also be deformed by tightening it excessively when mounting the chuck to the small end face of spindle end taper. Thus, the handle operation or chuck motion becomes heavy extremely. Moreover, take care since the more interference, the more failure becomes large. ※See a lathe matching list of the short taper chuck. When you need taper correction, since correction expense is required separately, please consult our company. ●For order of separate jaw scroll chucks JN-RA for short taper Tel: (0031) 0313 482566 Website: www.bisspecials.com Email: info@bisspecials.com Tel: (0031) 0313 482566 Website: www.bisspecials.com Email: info@bisspecials.com BIS Specials 部品・その他
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