This page has been edited 22 times. The last was made by - gheuer gheuer on May 19, 2015 1:04 pm GMT


9.1 Hand Lathe

Considerations

  • Pre-Operation Checklist is a prerequisite for ANY operation.
  • Proper stance and position are demonstrated.
  • The spur teeth and center are sharp and properly ground.
  • Live centers rotate smoothly and dead centers are sharp and lubricated.
  • Tail stock and spindle are properly positioned and locked securely.
  • Top edge of tool rest is smooth and free from nicks.
  • Tool rest is adjusted correctly relative to the spindle blank.
  • Spindle blank is from clear, even grained wood, free from checks or other defects.
  • All gouges, parting tools, skews or other tools are sharp and ready to use.
  • Speed is adjusted to suit diameter of spindle being turned.
  • Lathe cutting tools are fed with a smooth, continuous and controlled feed motion.
  • Operator clears machine and cleans work area after use.
  • Required OSHA approved personal protective equipment is worn.
  • No loose clothing, jewelry etc. is worn by operator.
  • Dust collection is utilized effectively.
  • Lock-out/Tag-out procedure is in place and followed.

Pre-Operation Checklist

Level 1

  • Verifies spindle blank turns freely by hand without excessive play between centers or contacting the tool rest.
  • Verifies that tool rest and tail stock are firmly locked in position.
  • Verifies height and clearance adjustment of tool rest.
  • Verifies dead center is lubricated (if applicable).
  • Verifies that tools are sharp and ready to use.
  • Verifies rotational speed selected does not produce unacceptable vibration.

Level 2

  • Prepares and installs spindle blank between centers.
  • Adjusts and locks position of tool rest base and tailstock.
  • Adjusts height and clearance of tool rest.
  • Adjusts rotational speed to optimal setting with dial or step pulleys.
  • Inspects drive belts to confirm they are free from cracks and tensioned correctly.
  • Inspects pulleys to confirm positive attachment to drive shaft.
  • Lubricates dead center as required.
  • Meets Level 1 performance standard.


9.1.1 - Spindle Turning

Level 1

Given a suitable 50 mm (2") square, 400 mm (16") long spindle blank installed between centers and with the tool rest set to the correct height and clearance, use a sharp gouge to produce a cylinder to a specified diameter 45 mm (1 3/4").
Performance Standard -
  • Surface of cylinder is free from torn grain.
  • Surface of cylinder exhibits smooth, continuous cuts from end to end.
  • Surface of cylinder is flat.
  • Diameter is the same when checked at both ends with calipers, target deviation not more than ±.0.4 mm (1/64") [0.0156"].
  • Diameter is the same when checked at 3 equidistant locations along the length of the cylinder, target deviation not more than ±.0.4 mm (1/64") [0.0156"].

Level 2

Given a suitable cylindrical spindle blank mounted between centers and with the tool rest adjusted to the correct height and clearance, use a mirror image pattern, gouges, round nose chisels, spear point chisels, parting tools and skews to produce a cove, bead, "V",shoulder, ogee, and taper cut.
Performance Standard -
  • Profile cuts are positioned correctly along the length of the spindle, target deviation not more than ±0.8 mm (1/32") [0.0312"].
  • Profiles match pattern, target deviation not more than ±0.8 mm (1/32") [0.0312"].
  • Meets Level 1 performance standard.


9.1.2 - Faceplate Turning

Level 1

Given a softwood blank 200 mm (8") in diameter and 75 mm (3") thick, mounted (by means of a paper joint) to a faceplate equipped with a plywood faceplate liner on the inboard side of the lathe, and with the tool rest correctly positioned and locked, produce a straight-walled container to specified depth and side wall thickness.
Performance Standard -
  • Inside and outside surfaces of container are free from torn grain.
  • All surfaces of container exhibit smooth, continuous shorn cuts.
  • Surfaces of container are flat.
  • Wall thickness is uniform when checked with calipers at top, middle, and bottom, target deviation not more than ±1.5 mm (1/16") [0.0625"].
  • Depth of container is as specified, target deviation not more than ±1.5 mm (1/16") [0.0625"].

Level 2

Given the blank described in Level 1, turn a bowl to specifications with convex exterior and a concave interior.
Performance Standard -
  • Inside and outside surfaces of bowl are free from torn grain.
  • All surfaces of bowl exhibit smooth, continuous shorn cuts.
  • Inside and outside surfaces have curves which match the negative image pattern provided.
  • Thickness of bowl sides is uniform when checked with calipers at top, middle, and bottom, target deviation not more than ±1.5 mm (1/16") [0.0625"].
    Depth of bowl is as specified, target deviation not more than ±1.5 mm (1/16") [0.0625"].
  • Meets Level 1 performance standard.