Jet JBM-5 Operating Instructions Manual

Also see for JBM-5: Operating instructions and parts manual Operating instructions and parts manual

Contents

Fig 5NOTE:The slot in the chisel should face to the right or left sideonly. The opening will allow chips to escape duringoperation.Push the chisel up as far as possible into the head. Thenlower the chisel 1,5 to 4mm, depending on the type of woodbeing worked. Tighten the screw to hold the chisel in place.Push the bit up through the chisel opening as far as it willgo. Lock the drill bit in place with the chuck key.Loosen the screw and push the chisel up against thebushing and tighten the screw. This should provide theproper distance between the points of the chisel and the bit.NOTE: The chisel should be adjusted parallel. Use theworkpiece as a gauge (Fig 6).Fig 6Close the chuck access doors before starting the machine.Using bits with shorter shanks:It will be necessary to attach the spindle extension.Place a 10mm open spanner on the motor spindle and usethe chuck key to unscrew the chuck.Attach the spindle extension to the chuck and reinstall.7.2 180° Head rotationRemove the three hex socket cap screws at the base androtate head and column 180°.Doing this will enable you to outboard mortise taller items.7.3 Sharpening chisel and bit:The chisel and bit should be kept sharp for bestperformance.Sharpen the bit by using a small file, following the originalshape of the bit.File the inside edge of the spur (A, Fig7), the sides of thecentre point (B) and the cutting edge inwards toward theflute of the bit (C).Fig 7Do not file the outside edges of the spur as this will affectthe diameter of the bit.Sharpen the chisel on the cutting edge inside only.8. Maintenance and inspectionGeneral notes:Maintenance, cleaning and repair work may only becarried out after the machine is protected againstaccidental starting by pulling the mains plug.The mortise requires only minor maintenance, such aslubrication, routine adjustments and sharpening of chiseland bit.Clean the machine regularly.Defective safety devices must be replaced immediately.Repair and maintenance work on the electrical system mayonly be carried out by a qualified electrician.9. Trouble shootingMotor doesn’t start*No electricity-check mains and fuse.*Defective switch, motor or cord-consult an electrician.Chisel clogged with chips*Clearance chisel to bit not enough-set bit 1,5 to 4mm below chisel.*chips cannot clear the chisel-observe chisel slot and working order.