1489 Каталог KENNAMETAL 2013 Инструментальная оснастка для металлорежущих станков Стр.M89

Каталог KENNAMETAL 2013 Инструментальная оснастка Стр. M89 1489 Lab2u

Kennametal Technical Information HPMC System The HPMC (High-Performance Milling Chuck) System (continued) Cutting Tool Requirements The outside diameter of the cutting tool shank and the inside diameter of the HPMC System must be wiped with a clean dry cloth before assembly. Any contamination will increase runout and reduce gripping force. Carefully monitor the cutting tools used in these chucks so they do not exceed h6 (nominal to -.0005") on the shank diameter. Use tools as close to nominal as possible. Cutting tool shank roundness should be within 0,003mm (.0001"). Undersized tools cause excessive stress and may cause chuck failure. Optimal chuck performance is attained when the cutting tool shank is round, without flats. Cutting tools with small flats may be held, but they will increase runout. Whistle and flatted cutting tool shanks are recommended in conjunction with reducing sleeves. For best performance, keep shank flats to a minimum. The minimum length of engagement is 2x the diameter of the cutting tool shank. Short holding length may cause the tool and/or chuck to break. This could dislodge the cutting tool and result in serious injury to the operator. The milling chuck should never be tightened without a cutting tool inside the bore. High gripping forces will cause permanent deformation to the inside diameter. Maintenance Operations Greasing the needle bearing is the only required maintenance. Follow the procedure below to ensure maintenance is properly performed: 1. Tighten the locknut clockwise to obtain clearance from the retaining ring. 2. Remove the retaining ring from the chuck. 3. Unlock the locknut counterclockwise, and lift the nut assembly from the chuck. 4. Wipe off old grease from the milling chuck and all other components. 5. Recoat the needle bearings in the locknut liberally with a quality, water-resistant grease. 6. Regrease the outside diameter of the milling chuck where the locknut is housed. 7. Reinstall the locknut on the milling chuck body and tighten to gain clearance for reinserting the retaining ring. 8. Tighten and loosen the locknut several times. Recheck the retaining ring for correct fitting. 9. Wipe away any excess grease. Please contact the Kennametal Service and Repair Department to have your Kennametal products serviced or repaired by qualified Kennametal service technicians. Setting the Accuracy of the Milling Chuck Heavy Milling Tighten the locknut all the way down with a milling chuck wrench until the O-ring on the locknut just touches the flange of the milling chuck body (O-ring should not be compressed). Finish Cut Back the locknut off 1/8 1/4 of a turn from above position. Best accuracy 5 pm (.0002") at 3x diameter up to 50mm (2"). > Accuracy 10-20 pm (.0004-.0008") at 3x diameter up to 50mm (2"). CAUTION DO NOT over tighten the milling chuck without a tool shank inserted. This may cause serious damage to the milling chuck or loss of performance. Kennametal M89 Technical Information