Lathe Operations: Facing

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Facing Operations Facing is the process of removing metal from the end of a workpiece to produce a flat surface. Most often, the workpiece is cylindrical, but using a 4-jaw chuck you can face rectangular or odd-shaped work to form cubes and other non-cylindrical shapes.

When a lathe cutting tool removes metal it applies considerable tangential (i.e. lateral or sideways) force to the workpiece. To safely perform a facing operation the end of the workpiece must be positioned close to the jaws of the chuck. The workpiece should not extend more than 2-3 times its diameter from the chuck jaws unless a steady rest is used to support the free end. Cutting Speeds

If you read many books on machining you will find a lot of information about the correct cutting speed for the movement of the cutting tool in relation to the workpiece. You must consider the rotational speed of the workpiece and the movement of the tool relative to the workpiece. Basically, the softer the metal the faster the cutting. D…

General Specification and Leading Particulars of BEML Tractor

There are many types of tractors used in industries for various purposes. BEML tractor is mainly used for towing aircraft from hangers to the dispersal area. Bharat Earth Movers Ltd Bangalore manufactures this tractor. It has got 75 Ton towing capacity. Ashok Leyland engine and Allison transmission is installed in this tractor. Hydraulic torque converter is used for jerk free towing operation and to increase power. The steering is open center, non-reaction hydraulic type that provides greater safety and comfort. Couplers are attached at front and rear for connecting tow bar. Air brake and parking cum emergency brake is also provided for greater safety.



General Specifications



Engine










































ModelAshok Leyland ALU-402/2
Max rated HP110 HP
Max RPM2400
No. of Cylinder06
Bore107.18 mm
Stroke120.65 mm
Displacement6540 cc
Compression ratio16:1
CoolingWater cooled


 Transmission


















ModelALLISION TRT 2221-3 2 forward and 2 reverse speeds single lever full power shift control
ConvertorTT 260, 2 stage, 2 phase, 4 element
Stall ratio5.11: 1 (Torque Multiplication)


 Tractor Speeds






















Forward-19KMPH
Forward-225KMPH (Rated)
Reverse-19KMPH
Reverse-225KMPH (Rated)


 Axles














FrontSection, steer able axle with leaf spring suspension and shock absorbed
RearHeavy duty with conventional differential, rigidly mounted


 Weight






















Gross Value Weight10150 + 2%
DistributionRear – 6600 Kgs
Front – 3550 Kgs
TyresFront – Single, Rear – Dual


 Brakes














Service BrakeAir actuated, internal expanding shoe brakes
Parking-cum emergency brakeInternal expanding manually actuated


 Steering






























TypeFull time power steer
Turning Circle Radius4150 mm
Seating2 Seats one for operator one for co-operator
CouplesHeavy Section welded, with 50 mm drop pin
Located400 mm in front and 300 to 700 mm in Rear from ground level.
Draw bar Pull6800 Kgs. At top 6000 Kgs at bottom

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