Page 181 of Advanced Drilling Equipment by Cooper Power Tools

microstop drill-cage for drilling reaming and countersinking rb 356 hpi 58 7/16 20 f inches special for drill countersinking reamers and taper-lok cutters bulk tool attachment 7/16 20 f stroke 58 mm 2.283 body off Ø 38 mm 1.5 dia overall length maxi 292 mm 11.5 mini 264 mm 10.4 weight 970 g code number 10.050.050 advantages mounted on three needle bearings this high precision drill-cage ensures perfect concentricity it has been specially designed for drilling reaming and countersinking operations removable adaptor with two possibilities of use a chuck clamping of the straight shank with 3 wrench flats b direct fitting on the spindle without using the drill chuck this gives perfect concentricity and noticeably reduces the length and weight of the drill-and-tool assembly results are higher performance improved machining and much less fatigue for the operator cemented hardened and ground chrome-nickel steel spindle mounted on three needle bearings and a ball thrust bearing body of specially treated chrome steel fully ground throughout ground centring-cone of the cutter 120° for perfect concentricity microstop depth adjustment 1 scale division .001 safety locking ensured by a locknut equipped with a seal this patented feature allows an easy loosening of the locknut without damage to the drill-cage 7-32

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