Friction Drop Hammers

• Suitable for precision forging for:
  • Automobile
  • Railways
  • Defense
  • Aeronautics
  • Hand Tools
  • Agricultural
  • Bicycle
  • Other engineering industries

Anvil Block:

• Made of grey cast iron weighing approximately 20 times the nominal capacity of the hammer
• Machined on both top and bottom faces to hold die holder firmly and maintain position of columns
• Die holder is forged from high grade alloy steel, hardened, and positioned with alloy steel tapered wedge

Columns, Slides, and Tup:

• Cast steel columns, annealed and machined
• Positioned by a large spigot on each foot fitting into a machined recess in the anvil block
• Columns locked with tapered wedges of alloy steel for firm alignment
• Ensures accurate grinding of tup (made of EN-9 cast steel)
• Clearance between tup and guideways maintained with tapered wedge (brings columns inward) and drawback bolt (pushes columns outward)
• Synthetic rubber mat on anvil block dampens shock vibrations, increases life of tup and columns, and ensures smooth long-term operation

Gear Head:

• Heavy duty gear head fabricated from rolled steel sections, mounted on top of columns
• Drive via 'V' belts from high torque AC electric motor, through flywheel and reduction gears to lifter shaft
• Friction lifting system on lifter shaft uses double ball bearings and a central phosphorous bronze bearing
• Friction lifter: constantly rotating drum and brake-lined steel band
• Band anchored at one end to lifter drum, other end carried by camshaft actuated by a lever
• Lever operated by pulling cord, passing through capstan bush attached to lifter shaft
• Puling the cord tightens brake around drum via camshaft; lifter drum rotates and tup is lifted with nylon belt
• Releasing the cord disengages friction band, allowing free fall of tup (spring-loaded arrangement)
• Spring-loaded buffer acts as stopper for lifting drum in rest position
• Positive water cooling for friction drum to prevent excessive heating