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ToolMaster TM-U3 Instruction Manual

Universal d bit grinder (240v) 1/4hp
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INSTRUCTION MANUAL
TM-U3
Universal D BIT Grinder (240V)
1/4HP
G1975

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Summary of Contents for ToolMaster TM-U3

  • Page 1 INSTRUCTION MANUAL TM-U3 Universal D BIT Grinder (240V) 1/4HP G1975...
  • Page 2 GRINDING SPINDLE The spindle bearing has been factory-adjusted to exclude play while allowing for free-running of the spindle. In the event some play develops in the course of time, such play should be taken up by tightening the two nuts M. for this purpose, pull spindle from its seat after having loosened screw S and removed the parts as indicated When tightening the nuts allow for a freerunning spindle.

  • Page 3: Nomenclature Of Controls

    Nomenclature of Controls The details below are used in most of the procedures listed in this manual, unless otherwise stat- Wheel dressing attachment Spring collet clamping quill Cross slide clamping lever Vertical swivel mount setting scale Vertical swivel mount clamping lever Horizontal swivel mount clamping lever Tubular guide clamping lever Horizontal swivel mount index drum...
  • Page 4 INDEX HEAD Servicing The Index Head Bracket General After a major period of use it will be necessary to dismantel the index head bracket and to clean and lubricate the collet sleeve bearing, the index head slide, and the swivel arm. Collet Sleeve Bearing To remove the collet sleeve proceed as follows: Remove ring nut N5, index drum N4, and index ring, in that order.
  • Page 5 Adjusting the Clamping Mehanism of Index Drum F. After constant use the the clamping lever T6 may no longer function correctly to lock the the swivel index drum F. To correct this screw U2 will need to be asdjusted. To do this remove the swivel arm as described above.

  • Page 6: Dressing The Grinding Wheel

    DRESSING THE GRINDING WHEEL NOTE ! Diamond wheels should not be dressed. If using abrasive wheels, wheel trueing and dressing should be performed at regular intervals. For abrasive wheels, dressing is done by means of a diamond set into a tip of a rod. The diamond dresser is attached to a arm.
  • Page 7 Cutter Profiles-Tool Angle-Cutting Speeds Cutter Profiles As rule, single-lip milling cutters are given one of the seven basic profiles Illustrated below, Fig 1. 1. cylindrical, w/end relief 2. cylindrical, w/off-center radius 3. cylindrical, rounded off 4. pointed 5. tapered, w/end relief 6, tapered, w/off-center radius 7. tapered, w/rounded point Above are illustrated the seven basic cutter profiles and cross seciional views of the profiles they will produce, Cutter with end relief. Cutter with pointed end. Rounded-off cutter Tool Angles As is the case with all metal cutting tools, single-lip milling cutters require the proper amout of cut- ting edge relief or back rake angle for maximum stock removal and high surface finish. As regards...
  • Page 8 Cutter Speeds As regards singie-lip milling cutters, it is recomended to use cutting speeds three times higher than those used with standard type milling cutters. The data tabulated below should be used only as a guide, as such factors as, drive conditions and available spindle speeds will also have to be taken into consideraton.
  • Page 9 Circular . Grinding of -Cutters Grinding the Back Angle of End Cutting Edges(Round) Cutter profiles having either on-center or-off-center radii are derived from cylindrical single lip cut- ters having a straight end cutting edge by rounding off the corner as shown in Fg.1(No. 2 and 3 profiles). In rounded cutters of this type the back rake angle of the side cutting edge is the same as that of the end cutting edge.
  • Page 11 Centering the Cutter Lip by Grinding Cylindrical single-lip milling cutters are supplied by the manufacturer with the lip preformed by rough milling (see Fig. 1). As a result, the cutter lip will first have to be accurately centered by grinding. Rough grinding of the lip is performed manually by holding the cutter gainst the circumference of the grinding wheel (see Mg. 2). This opration is followed by finish grinding in the machine. The off-center tolerance Is ± .0004” (0.01mm), which should be checked with a micrometer caliper (see Fig, 3 on the last page).
  • Page 13 Circular Grinding of Cutters Grinding the Back Angle of Side Cutting Edges After centering the lip it will be necessary to grind the back rake angles to the sides of the cutting edge and the end cutting edge. The back rake angles of both cutting edges should be selected to suit the material to be cut.
  • Page 15 Circular Grinding of . Cutters Grinding the Back Angle of End Cutting Edges(Straight) The end cutting edge illustrated in Fig.1 may be ground In an operation immediately following the grinding of the side cutting edge; or it may be ground independently. In the latter case the cutter will have to be aligned by means of gauge C and clamped in position.
  • Page 17 Circular Grinding of -Cutters Grinding the Back Angle of End Cutting Edges Cutter profiles having either on-center or-off-center radii are derived from cylindrical single lip cutters having a straight end cutting edge by rounding off the corner as shown in Fig.1(No. 2 and 3 profiles). In rounded cutters of this type the back rake angle of the side cutting edge Is the same as that of the end cutting edge. For this reason it is necessary, :during grinding the end rake angle, that the work fixture is set at the side rake angle by means of setting scale S2.
  • Page 19 Grinding Pointed Cutters Where pointed cutters are concerned, both the included angle of the point and the back rake angle are produced In one operation (see Fig. 1). The back rake angle should be selected to suit the material to be cut.
  • Page 21 Grinding Tapered Cutters Circular Grinding of sice and End Cutting Eiges Tapered cutters can be ground to size in the machine without the use of any measuring instrument, ex- cept for the scales provided on the mahcine. For circular grinding operations of profiled cutters follow this procedure : Setup Operations 1. Engage pin C into long-slot. 2.
  • Page 22 Twist Drill Grinding Attchment The twist drill grinding attachment has been designed for grinding twist drills of 3 to 18 mm (1/8” to 9/16”) diameter. The lip angle is always 116° , while the back rake angle is adjustable as required. To mount the attachment K1 (see Fig. 2), insert a 12 mm ( 1/2”) spring collet,into the index head.
  • Page 23 INSTRUCTION FOR GRINDING A END MILL Change the original workhead into End mill attachment workhead. (as drawing I) Insert the suitable size U2 collet into the tapered hole of the end mill attachment workhead.. Insert the end mill Into the U2 collet and fasten it, So that the end mll will not turn. (as drawing II) -Set the center of the Wheel-headat the height• of-the work head:spindle center and locate.>ihe end milt•.EQpaeae#irtg I about 5mm form grinding’ wheel. (as drawing III) Swiving the end mill attachment workhead by the degree of relief angle.
  • Page 24 Twist Drill Grinding Attachment The twist drill grinding attachment has been designed for grinding twist drills of 3 to 16mm (18” to 58”) di- ameter. The tip angle is always 116 , while the back rake angle is adjustable as required. To mount the attachment (see Fig..
  • Page 25 12mm Collet Location pin0 sets This slot the travel...
  • Page 26 LATHE TOOL GRINDING ATTACHMENT Change the original workhead with ithe Lathe tool attachment (as displayed below) |nsert the Lathe tool bit into the Lathe tool attachment workhead and fasten it, so that the Lathe tool bit will not move Set the center of Lathe grinding attachment at the height of the grinding wheel at the spindle center. Recommended Angles and Relief Each manufacturer have their own recommended relief angle for machining differt material .
  • Page 27 MILLING CUTTER ATTACHMENT Remove the orgininal work head from the dove tail slide by loosening knurled screwsT5 and S1 Slide the milling cutter attachment into the dovetail and secure with screws T5 and S1 Milling cutters must be sharpened occasionally to keep them in good operating condition. When grind- ing milling cutters, care must be exercised to maintain the proper angles and clearances of the cutter.
  • Page 28 Locate the tooth rest into the outer edge of the cutter blade, and position it as close as possible to the end of the cutters cut- ting edge to be ground making sure that there is clearance and the finger will not touch the grinding wheel. Move the tooth rest until the tooth rest’s point and the cutter’s centre are on the same line horizontally (Fig.1) Releasde handle T and tilt the endmill gring attachment down to the angle required for the cutter relief.
  • Page 29 Sharpening The Sides of End Mills and Slot Drills Set the tooth rest into the outer edge of the cutter blade, and position it as close as possible to the edge to be ground making sure that there is clearance and the finger will not touch the grind- ing wheel. Move the tooth rest until the tooth rest’s upmost point and the cutter’s center are on the same line horizontally Pull the sleeve slightly backwards, so that the cutter clears the wheel.

  • Page 30: Spare Parts

    SPARE PARTS...
  • Page 34 General Machinery Safety Instructions Machinery House requires you to read this entire Manual before using this machine. 1. Read the entire Manual before starting 14. Use correct amperage extension cords. machinery. Machinery may cause serious injury if Undersized extension cords overheat and lose not correctly used.
  • Page 35 Tool & Cutter Grinder Safety Instructions Machinery House requires you to read this entire Manual before using this machine. 1. Maintenance. speed and wait for 1 minute before standing in front Make sure the Tool & Cutter Grinder of the Tool & Cutter Grinder. is turned off and disconnect from the main power supply and make sure all moving parts have come to 11.