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brown & sharpe 618 MICROMASTER Operation And Maintenance Manual

Surface grinding machines
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OPERATION
AND
MAINTENANCE
OF THE
618 MICROMASTER
SURFACE GRINDING MACHINES
Brown & Sharpe

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Summary of Contents for brown & sharpe 618 MICROMASTER

  • Page 1 OPERATION MAINTENANCE OF THE 618 MICROMASTER SURFACE GRINDING MACHINES Brown & Sharpe...
  • Page 2 OPERATION AND MAINTENANCE of the 618 MICROMASTER SURFACE GRINDING MACHINES BROWN & SHARPE MFG. Co. PRECISION PARK, NORTH KINGSTOWN, R. I., U. S. A. Printed in U.S.A. 5C-10-66...
  • Page 3 FOREWORD The purpose of this book is to give a thorough working knowledge of the Brown & Sharpe 618 Micro- master Surface Grinding Machine. 'I'he Operator and Set-up Man will need to be thoroughly familiar with the information given in Chap- ter Ill.

  • Page 4: Table Of Contents

    CONTENTS PAGE CHAPTER I Installing or Relocating the Machine CHAPTER Il Operating Controls and Principal Parts Power Table Travel and Power Cross Feed (6) ; Hand Table Travel and Hand Cross Feed (7). CHAPTER III Set-up Adjustments NV heel Spindle (8) ; Care and Use of Grinding Wheels (9) ; Longitudinal Table Travel (10) ; Cross Feed (11) : Suggestions on Set-up and Operation (12).

  • Page 5: Chapter Il

    BROWN SHARPE MFG. CO. & CHAPTER 1 Installing or Relocating In lifting or moving the machine, it is recom- mended that the rope be rigged as shown in Figs. 1 and 2. Place wooden blocks or protective material between the rope and the machine wherever the rope is liable to damage any part.
  • Page 6 The machines are shipped with a brace clamped to The machine should be located on a level founda- the machine. This brace holds the upright in position tion or floor, a solid vibrationless foundation be- as a safety measure during shipment. This brace must ing essential where the finest finish must be pro- be removed before the machine is used.

  • Page 7: Operating Controls And Principal Parts

    SHARPE MFG. CO. & CHAPTER II Operating Controls and Principal Parts of the 618 Micromaster Surface Grinding Machine Machine illustrated has power table travel and power cross feed, with elevating hand- wheel located on front of bed. — 7 —...
  • Page 8 618 MICROMASTER SURFACE GRINDING MACHINE Hand Table Travel and Hand Cross Feed Machine illustrated has hand table travel and hand cross feed, with elevating handwheel near top of column. 1. Cross Feed Handwheel 22. Oil Level Sight Glass 2. Dial Locknut, Cross Feed Handwheel 23.

  • Page 9: Set-Up Adjustments

    8" diameter wheel is 12". each of the controls and adjustments used in set- If a 7" diameter wheel is used the height of work ting up and operating the 618 Micromaster Sur- ground is 12 ".
  • Page 10 618 MICROMASTER SURFACE GRINDING MACHINE the machine. When additional wheels are used, extra wheel sleeves should be procured so that each wheel can be kept on its own sleeve. Thus, in changing from one type of wheel to another, the...
  • Page 11 BROWN SHARPE MFG. CO. & into the wheel sleeve and tighten the inner screw a slow, steady manual cross feed, taking care to against the spindle, thus loosening the wheel avoid any longitudinal movement of the table. sleeve without harmful jarring. In truing a wheel for rough grinding, take a cut In putting a wheel on the spindle, first see that about 0.000,5"...
  • Page 12 618 MICROMASTER SURFACE GRINDING MACHINE Fig. 8. Front Controls Cross Feed Power Cross Feed. The cross feed handwheel is located centrally on the front of the machine (Fig. 8). it has an adjustable dial graduated to read to 0.000,2". A handwheel (at extra cost) is availa- ble which has a separate adjustable dial graduated to read to 0.000, 1”.
  • Page 13 BROWN SHARPE MFG. CO. & travel to prevent any mishap. The dogs can be set work are to be done, it is best to use one machine to limit table travel in either direction. for that class of work and do the finish grinding on a machine reserved for finish grinding only.

  • Page 14: Typical Operations

    While no attempt has been the machine. Operations within the capacity of the made to describe each job in detail, the main fea- 618 Micromaster can be performed with ease and tures of set-up and operation are outlined as a efficiency.
  • Page 15 BROWN SHARPE MFG. CO. & Fig. 12. Picture at right illustrates the vertical capacity of the ma- chine. Fig. 13. Another typical operation in which slot and side wheel grinding are featured. — 15 —...
  • Page 16 618 MICROMASTER SURFACE GRINDING MACHINE Fig. 14. Finishing four legs of a drill jig to uniform height. Fig. 15. Typical operation showing work piece clamped to the table. — 16 —...

  • Page 17: Maintenance

    BROWN SHARPE MFG. CO. & CHAPTER V Maintenance Lubrication Removing Spindle Unit from Machine With machines having power table travel or Open the wheel guard cover, remove the both power table travel and power cross feed, lu- wheel, and then the wheel guard. Then take out the brication is obtained by tapping off the hydraulic four clamping screws in the spindle unit flange.
  • Page 18 618 MICROMASTER SURFACE GRINDING MACHINE SECTION Y-Y SECTION X-X Fig. 16. Cutaway View of the Plain Bearing Spindle Unit Take particular care to keep the oil clean. Use Removing the Spindle. Remove the spindle a clean oil can, and always wipe the oiler bottle...
  • Page 19 BROWN SHARPE MFG. CO. & and be careful not to use any more force than is spots, continue the scraping until the spindle goes necessary. into the boxes with the original washer bearing against the end of the front box. After completing 6.
  • Page 20 618 MICROMASTER SURFACE GRINDING MACHINE guard into proper relation with the grooves in the Possible Sources of Grinding Trouble spindle. In doing this, be careful to keep surface L Work shows wheel marks (chatter finish) square with the sides of the dust guard. Fasten the...
  • Page 21 BROWN SHARPE MFG. CO. & machine to run with the spindle turning in the wrong direction. — 21 —...

  • Page 22: Hydraulic System

    618 MICROMASTER SURFACE GRINDING MACHINE CHAPTER VI Hydraulic System Fig. 17. Front Compartment Reveals Hydraulic System The reservoir for the hydraulic system should one of the solvents available from the several oil be filled with approximately 15 gallons of high lu- companies to flush out the system.
  • Page 23 BROWN SHARPE MFG. CO. & they can easily be reset. The high pressure relief feed amount valve, a cross feed control valve and valve (X) is tested by removing the one quarter a cross feed truing and rapid positioning valve. inch pipe plug (E) and attaching a pressure gage.
  • Page 24 618 MICROMASTER SURFACE GRINDING MACHINE The direction valve is actuated manually by a P.S.I. pressure at this point which will force the oil lever on the right side of the machine (J). This through the median unit for lubrication when nec- valve has three positions: OFF, IN and OUT.
  • Page 25 BROWN SHARPE MFG. CO. & — 25 —...
  • Page 26 618 MICROMASTER SURFACE GRINDING MACHINE essary. This oil drains back to the reservoir and forward. The fine feed rates are very often er- through a filter. ratic with air in the cylinder. If the cross feed is found to be sluggish, it may be due to dirt at the Hydraulic Maintenance resistance plug (see circuit diagram) .

  • Page 27: Grinding Wheels And How To Select Them

    BROWN SHARPE MFG. CO. & CHAPTER VII Grinding Wheels and How to Select Them Grinding wheels are made of crushed abrasive edge, fine-grain wheels are used. Combination or cutting grit held together by a substance known wheels usually cut fast yet leave a good finish. as the bond.

  • Page 28: Optional Mechanisms And Additional Equipment

    618 MICROMASTER SURFACE GRINDING MACHINE CHAPTER VIII Optional Mechanisms and Additional Equipment (Furnished at Extra Cost) Various items of additional equipment availa- The motor-driven fan on the separator tank draws ble as extras are described and illustrated in this the air at high speed through a flexible pipe from an adjustable exhaust nozzle attached to the wheel chapter.
  • Page 29 BROWN SHARPE MFG. CO. & Fig. 20. Power Down Arrangement Feed bracket on machines with a hydraulic power table. The made directly from the index dial. To get accurate ON-OFF control for this arrangement is the downfeed readings, it is necessary that the wheel stop bear control knob on the right side of the bracket, above and against the right side of the positive stop.
  • Page 30 618 MICROMASTER SURFACE GRINDING MACHINE 3. Re-engage the downfeed adjustment pinion. Check the size of the work and make necessary ad- j ustments with a down feed index dial, always working to the positive stop. The repeat accuracy will then be insured, under normal operating conditions.
  • Page 31 BROWN SHARPE MFG. CO. & Coolant collects in the table channels and is delivered The castered base or dolly (Fig. 25) provides a ready to a trough in the bed at the rear of the table which then means of moving the coolant tank or separator tank to discharges into a trough at the side of the machine and other machines or to a convenient place for emptying goes to the supply tank through a flexible hose.
  • Page 32 618 MICROMASTER SURFACE GRINDING MACHINE bring the face of the grinding wheel in line with the index centers. Then, with the work mounted between centers, disengage the index pin and turn the worm to feed the face of a tooth into the grinding wheel, feeding...
  • Page 33 BROWN SHARPE MFG. CO. & No. 421-4 Flanged Vise This vise can be clamped at right angles or parallel to the wheel spindle. The removable jaws are of tool steel, hardened and ground, 4 " wide and 1 deep, and open 2". Dis- 4 ⁄...
  • Page 34 618 MICROMASTER SURFACE GRINDING MACHINE is made by means of the two screws upon which the outlines up to 1" in radius and face angles up to 90° either side of zero, and permits combinations of radial template rests. and angular shapes to be developed.
  • Page 35 BROWN SHARPE MFG. CO. & In either case, to obtain the desired shape adjust the height of the spindle head to bring the center of the spindle horizontal with the diamond point. Continuous Radius and Tangent Wheel Truing Attachment This attachment (Fig. 34) is designed to form, with one continuous movement of the diamond, accurate ra- dii on grinding with accurate tangents at either or both sides of the radii.
  • Page 36 618 MICROMASTER SURFACE GRINDING MACHINE — for work wherever precision angular settings are re- quired. With an overall accuracy within .0002", they give angular settings at gage block accuracy. Fig. 37. Compound Perma Sine The Compound Plate (Fig. 37) is superbly suited for complex angles.
  • Page 37 BROWN SHARPE MFG. CO. & stream with the starting of the machine. positioning of the grinding wheel. This eliminates the time wasting motion of "feeling" for the work piece. Precision control of mist is provided by a nee- The arrangement is adjustable over the entire vertical dle valve on the jet.
  • Page 38 The Brown & Sharpe line includes the following. Milling Machines — Plain, Universal, Rangemaster, and Vertical. Attachments: Milling Cutters, Arbors, Adapters and Collets. Grinding Machines — Universal, Plain, Surface, Universal and Tool. Attach- ments and Grinding Equipment. Screw Machines — Automatic, Automatic Forming and Cuffing-Off, and Automatic Chucking.

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