Technical Information
Operating Instructions: Finish Boring
Boring Bar Installation
- Loosen the clamp screws.
- Insert boring bar and reduction bushing (if applicable) into the carrier. Align reduction bushing with slots 90° to clamp screws. Note: We do not recommend using boring bars with flats.
- Adjust the boring bar to the minimum desired length.
- Rotate the boring bar to align the insert tip to the alignment mark atop the boring head body. The bar should be above the line for best timing. Note: Adjusting the position of the insert tip adjusts the “timing” of the bar which optimizes the surface finish and performance.
- Tighten the clamp screws.
Torque Specifications:
Slide Lock Screw: 10 ft. lbs. Boring Bar Clamp Screw: 20 ft. lbs.
Boring Head Adjustment
- Install insert using the torque wrench provided.
- Loosen lock screw.
- 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. Always adjust by turning the spindle in the clockwise direction.
- Tighten the lock screw.
Torque Specifications:
Slide Lock Screw: 10 ft. lbs.
Using the Vernier
Find the line on the dial that exactly lines up with a line on the Vernier scale. This is at the zero mark on the dial. This is the reference point. Diametral increases in tenths are achieved by turning the dial clockwise until the appropriate line on the dial lines up with the appropriate line on the Vernier scale. For a .0006” adjustment, move the 6 on the dial in line with the 6 on the scale.
Torque Specifications:
Slide Lock Screw: 10 ft. lbs. Boring Bar Clamp Screw: 20 ft. lbs.
The vernier graduation is established by counting over the number of tenths adjustment desired beginning with the first graduation immediately to the right of the reference point on the vernier scale. If required, continue counting on the left side of the scale again moving counterclockwise as shown.
Finish Boring Head Maintenance
The Parlec precision boring head is constructed of alloy steel, stainless steel, and a graphite-based epoxy resin. The graphite resin is self-lubricating and requires no added maintenance. To insure long service life, two to four times a year depending on the severity of conditions, the head should be adjusted to the outward end of travel (do not force beyond mechanical stop) and a light spindle or machine oil applied to the exposed section of the carrier. This will lubricate the alloy components of the head. No further maintenance should be required.
