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Indexing chuck with draw bar clamping and manual indexing


MADT chucks series are self-centering. Jaws clamping is automatic trough a draw rod and a rear cylinder and manual indexing system.
• made in special high resistance hardened and cementing 60HRC steel UNI18NiCrMo5, to maintain a high degree of precision, reliability and quality
• jaws slides execution with gib allows good sliding surface finish with possibility to recover clearances consequent to wear
• shaft guide system with two lines of big filled cylindrical pre-loaded radial rollers and with an axially strong ball bearing
• indexing movement simple and reliable: a conical shutter guarantees the mechanical indexing. Indexing precision ±1’30”
• seals against contamination by coolant, chips and dust
• constant and long lasting precision
• easy installation to the machine
• standard with 4 indexing 90° + 1 indexing 45°.
• On request special indexing positions available (8×45°, 6×60°)


• self-centering clamping
• big clamping capacity
• versions with long jaw for workpieces that need a big radius of revolution
• quick and easy installation to the machine, it is request only the connection to the hydraulic cylinder on the lathe
• manufacturing of different pieces and also of small series
• workpieces with big radius of revolution and flanges with big diameter
• could be apply in the same machine with a conventional 3 jaws power chuck thanks to the quick retooling increasing unit flexibility and productivity
• the indexing device allowing a quick change between the multiple working axes
• good tools accessibility thanks to the chuck shape

ModelDiameterMax. closing force per jawMax. traction forceChuck openingChuck closingMax. rotation speedWeight
MADT 165C160 mm9000 N14700 N75 mm59 mm1800 rpm17 kg
MADT 195C195 mm14000 N23000 N95 mm78 mm1600 rpm24 kg
MADT 220C220 mm14000 N23000 N120 mm102 mm1500 rpm30 kg
MADT 220L220 mm14000 N23000 N120 mm102 mm1500 rpm32 kg
MADT 230C230 mm13000 N29000 N140 mm115 mm1400 rpm36 kg
MADT 230L230 mm13000 N29000 N140 mm115 mm1400 rpm38 kg
MADT 250C250 mm16500 N36200 N150 mm123 mm1300 rpm45 kg
MADT 250L250 mm16500 N36200 N150 mm123 mm1300 rpm47 kg
MADT 275C275 mm16500 N36200 N175 mm147 mm1200 rpm59 kg
MADT 275L275 mm16500 N36200 N175 mm147 mm1200 rpm62 kg
MADT 315C315 mm16500 N36200 N210 mm180 mm1000 rpm65 kg
MADT 315L315 mm16500 N36200 N210 mm180 mm1000 rpm70 kg
MADT 350C350 mm22000 N45500 N230 mm198 mm800 rpm76 kg
MADT 350L350 mm22000 N45500 N230 mm198 mm800 rpm80 kg

Ambient temperature 5-60°C
Sound emissions (sound pressure) ≤ 70 db (A) in each direction

The dimensions are indicative and susceptible to changes due to technical improvements. We reserve the right to make changes without notice.