Precision Workholding Solutions Quick Change …

1 Quick ChangeCollet ChucksPrecision Workholding of ContentsOverview & Product Features .. 2 Description of Chuck Models .. 3CB-NB Collet Chucks - Pull Back Design .. 4CB-ND Collet Chucks - Dead Length Design .. 6CB-NDR Collet Chucks - Pull to Close Dead Length Design .. 8CB-NK Collet Chucks - Combination Design .. 10CB-NS Collet Chucks - Sub Spindle Design .. 12CB-NR Collet Chucks - Non Rotating Design .. 14 Collet Changing Fixtures .. 16 Collet Chuck Accessories .. 17 Quick Change Collet Overview & Features .. 18SK42 BZI (1-5/8" - 42mm Capacity) Quick Change Collets .. 19SK65 BZI (2-5/8" - 65mm Capacity) Quick Change Collets .. 20 Large Capacity (SK80 BZI, SK100 BZI, SK120 BZI, & SK140 BZI) Quick Change Collets .. 21 Quick Change Collet Chuck Applications .. 22 Spindle & Draw Tube Data Sheet.

2 24 Commitment to ServiceMicroCentric Quick Change Collet Chucks are available from stock andcan be adapted to any machine configuration. MicroCentric is not onlycommitted to building the world's finest Workholding products, but wealso strive to provide our customers with unmatched service and Change Collet System OverviewHigh Clamping Force Parallel clamping designgenerates higher clampingforces than traditional colletand three jaw chucksChange Collets in15 Seconds MicroCentric Collets arecollapsed by a changingfixture for Quick removal andinsertion into the " Accuracy Runout of the workpiece(not only the tapered seat ofthe chuck) is guaranteed tobe within .0004" (0,010mm)TIR after collet changeLarge Clamp Range .040" (1 mm) range on modelsup to 2-5/8" (65 mm) capacity .080" (2 mm) range on largercapacity colletsHigh Spindle Speeds MicroCentric 42 mm and65 mm collet chucks modelsare rated to 6,000 rpm Models rated to 8,000 rpmare quoted on requestSuperior Rigidity Shorter overall chuck length Workpiece is machined closerto spindle face High chuck rigidity improvescutting tool life and allowshigher metal removal rates forshorter cycle times40302010600400200100 Clamping Force (kN)Breakaway Moment (Nm)50% higher clamping force60801004010203040 Clamping Force (kN)Up to 35% greater rigidityChuck Rigidity N/ mMicroCentric Collet ChuckConventionalCollet ChuckConventionalCollet ChuckMicroCentricChuck2 Collets AvailableFrom Stock MicroCentric stocks anextensive range of inch andmetric collets, in round andhex configurations.

3 Quick ship collets, that aredelivered in 5 days, areoffered for special sizes components of MicroCentric Collet Chucks are made from hardened and Precision ground alloy steel forhighest accuracy and long term performance. Their modular design makes it possible to adapt MicroCentricchucks to all machine spindle and draw tube Series - Dead Length DesignNDR Series - Pull to Close Dead Length DesignIn the NB series chuck, the collet is coupled directly to the draw tubeconnector. As the draw tube is actuated, the collet is drawn into thetapered seat, efficiently translating draw tube force into maximumclamping Series - Self Contained Design for Stationary ApplicationsThe NR series is a pneumatic or hydraulically actuated self-containedPull Back design for non-rotating applications. The collet is coupled tothe built-in piston and is drawn into the tapered seat as the chuck isactuated.

4 Part stops and ejectors can be mounted inside the chuck Change Collet Chuck Models3NK series chucks offer the added flexibility of being able to mount endstops inside the chuck body for easy conversion from bar to the ND series models the collet is coupled directly to the chuck bodyand remains fixed as the tapered seat moves forward when the chuck isactuated. This design keeps the collet in a fixed Z axis position duringclamping and imparts no pull back on NDR series collet chuck, is a new patented Dead Length design foruse with servo stop bar loaders. Similar to the ND series, the collet iscoupled to the chuck body, but the chuck is actuated as the draw tube ispulled into machine Series - Combination Design for Bar & Chucking WorkNB Series - Pull Back DesignNS Series - Dead Length Design for Sub SpindlesThe NS series is a reduced diameter Dead Length design for subspindles.

5 Similar to ND chucks, the collet is coupled directly to the chuckbody and remains fixed as the chuck is actuated. The NS also includes amounting for stops and ejectors inside the Features Pull Back design maximizes the efficiency of the clampingsystem by concentrating all forces in the direction of thespindle for highest accuracy and greatest overall rigidity Low profile OD and short overall length provides increasedtool clearance and maximum utilization of the machine's Z axis Radial adjusting screws Lubricated for life design requires minimal maintenance All components hardened and Precision ground for highestaccuracy and long life Spindle speeds up to 6,000 Collet Chucks - Pull Back DesignIn the CB-NB series collet chucks, the collet is coupled directly to the draw tube connector. As the draw tube isactuated, the collet is drawn into the tapered seat of the chuck body, efficientlytranslating draw tube force into maximum clamping SpecificationsStandard EquipmentCB-NB collet chucks include a spindle adapter plate and a blank draw tube connector.

6 Threaded draw tubeconnectors for specific machine configurations are furnished at no additional charge if draw tube dimensionsare provided with your purchase order. See page 24 for spindle and draw tube data ModelCB42-NBCB65-NBCB80 NBCB100-NBCB120-NB CB140-NBCollet ModelSK42 BZISK65 BZISK80 BZISK100 BZISK120 BZISK140 BZIT hrough " " " " " " Range+/- .020"+/- .020"+/- .020"+/- .040"+/- .040"+/- .040"+/- +/- +/- +/- 1mm+/- 1mm+/- 1mmDraw Tube ".160".160".275".275".275"4mm4mm4mm7mm7m m7mmMax. Draw Bar Force7,850 lbs10,095 lbs11,980 lbs14,580 lbs15,310 lbs16,074 lbs3,580 kg4,590 kg5,450 kg6,630 kg6,960 kg7,310 kgMax. Clamping Force14,130 lbs18,170 lbs21,560 lbs26,240 lbs27,560 lbs28,930 lbs6,425 kg8,260 kg9,820 kg11,930 kg12,530 kg13,150 kgMax Speed6,000 rpm6,000 rpm5,000 rpm4,500 rpm4,000 rpm4,000 rpmNet kg33 kg4 MicroCentric1-800-573-1139CB-NB DimensionsCB-NB chucks with spindle adapters other than those listed above are quoted on 2 Figure 1 ACBDEHFGFGHACBS pindleChuck ModelFig.

7 Nose A B C D EFGHCB42- " " " - " ".354" - " " " - " ".354" - " " " " " " ".354" " " " - " ".354" - " " " - " ".354" - " " " " " " ".354" " " " - " ".180" - " " " " " " ".180" " " " - " ".040" - " " " " " " ".040" " " " - " ".120" - " " " - " ".120" - Features Dead Length design produces no pull back on the workpiece Low profile OD and short overall length provides increasedtool clearance and maximum utilization of the machine's Z axis Radial adjusting screws Lubricated-for-life design requires minimal maintenance All components hardened and Precision ground for highestaccuracy and long life Stop plates and stop housings can be mounted inside thechuck body for chucking applications requiring end stops orpart ejectors Spindle speeds up to 6,000 rpmCB-ND Collet Chucks - Dead Length DesignIn the CB-ND series collet chuck, the collet is coupled to the chuck body and remains stationary as the taperedseat moves forward when the chuck is actuated.

8 This design keeps the collet in a fixed Z axis position duringclamping and does not create a pull back effect on the bar stock or Specifications6 Standard EquipmentCB-ND collet chucks include a spindle adapter plate and a blank draw tube connector. Threaded draw tubeconnectors for specific machine configurations are furnished at no additional charge if draw tube dimensionsare provided with your purchase order. See page 24 for spindle and draw tube data ModelCB42-NDCB65-NDCB80 NDCB100-NDCB120-ND CB140-NDCollet ModelSK42 BZISK65 BZISK80 BZISK100 BZISK120 BZISK140 BZIT hrough " " " " " " Range+/- .020"+/- .020"+/- .020"+/- .040"+/- .040"+/- .040"+/- +/- +/- +/- 1mm+/- 1mm+/- 1mmDraw Tube ".160".160".275".275".275"4mm4mm4mm7mm7m m7mmMax. Draw Bar Force7,850 lbs10,095 lbs11,980 lbs14,580 lbs15,310 lbs16,074 lbs3,580 kg4,590 kg5,450 kg6,630 kg6,960 kg7,310 kgMax.

9 Clamping Force14,130 lbs18,170 lbs21,560 lbs26,240 lbs27,560 lbs28,930 lbs6,425 kg8,260 kg9,820 kg11,930 kg12,530 kg13,150 kgMax Speed6,000 rpm6,000 rpm5,000 rpm4,500 rpm4,000 rpm4,000 rpmNet kg33 kgMicroCentric1-800-573-1139CB-ND Dimensions7CB42- " " - ".354" - -107mm9mmCB42- " " - ".354" - " " " " ".354" " " - ".354" - " " - ".354" - " " " " ".354" " " - ".180" - " " " " ".180" " " - ".040" - " " " " ".040" " " - ".120" - " " - ".120" - SpindleChuck Model Fig. Nose A B C D EFCB-ND chucks with spindle adapters other than those listed above are quoted on 2 Figure Collet Chucks - Pull to Close DeadLength Design for Servo Stop Bar LoadersStandard EquipmentCB-NDR chucks include a spindle adapter plate and a blank draw tube connector.

10 Threaded draw tubeconnectors for specific machine configurations are furnished at no additional charge if draw tube dimensionsare provided with purchase order. See page 24 for spindle data Features Pull to Close Dead Length design produces no pull back andwill not push the bar off the servo stop Radial adjusting screws Lubricated-for-life design requires minimal maintenance All components hardened and Precision ground for highestaccuracy and long life Spindle speeds up to 5,000 rpmThe CB-NDR is a new patented Dead Length design collet chuck to be used with servo stop bar loaders. TheNDR chuck is actuated as the draw tube is pulled into the machine spindle. The collet is coupled to the chuckbody and remains stationary as the tapered seat moves forward during clamping. This feature keeps the colletin a fixed Z axis position, and since the draw tube is moving into the spindle, the bar remains positionedagainst the servo SpecificationsChuck ModelCB65-NDRCB80-NDRQ uick Change Collet ModelSK65 BZISK80 BZIMax.