Operating Instructions

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Using the Vernier Scale

Find the line in the vernier scale that exactly lines up with a reverence line. Diametral increases in .001” are made by adjusting the dial clockwise one full reference line. Diametral increases in .0001” are made by adjusting the dial clockwise until the appropriate line on the vernier scale lines up with the next fixed scale reference line.

Assembly

1. Screw boring nose onto boring bar shank.
2. Loosen the clamp screws.
3. Insert boring bar shank and reduction bushings
(if applicable) with the slots 90? to clamp screws. Note: Do not use boring bars with flats. 4. Rotate the boring bar shank to align the insert tip to the alignment mark atop the boring head body. The bar should be slightly above the alignment mark for best timing. Note: Adjusting the position of the insert tip adjusts the “timing” of the bar which optimizes the surface finish and performance.
5. Adjust the boring bar to the minimum desired length.
6. Tighten the clamp screws, Max 20 ft/lbs. (1.13 Nm)

Adjustment

1. Loosen the slide lock screw.
2. Adjust tool position by turning and reading the dial. The dial is graduated in increments of .001” per graduation on the diameter. Fine adjustments of .0001” can be made utilizing the vernier scale.
3. Tighten the slide lock screw, Max 10 ft/lbs (1.13 Nm)

Maintenance

The Parlec precision boring head is constructed of alloy steel, stainless steel and a precision composite material. The internal components are self lubricating. To insure long service life, light spindle or machine oil may be applied to external moving parts. No further maintenance is required.

TORQUE SPECIFICATIONS

Slide Lock Screw	10 ft/lbs (1.13 Nm)
Clamp Screw	20 ft/lbs (2.23 Nm)