Boring Solutions
Accurate and cost effective, Parlec’s Boring Solutions Provide .0001" (.002mm) adjustment precision for a variety of bores along with advanced adjustable twin bore roughing systems. Precision modular component design allows for reduced inventory and stock delivery while ISO/ANSI inserts reduce production costs.
Products
PC Connections
The force Fr is created by tightening the PC screw. This results in line contact seating with high repeatable precision (.0002” on diameter). The geometry of the screw and mating hole in the male pilot creates the resultant force Fa.
Fa = 3.7 x Fr
The face to face clamping forces Fa’ are equal to the axial force Fa.
The torsional cutting forces are primarily transmitted by the friction between the mating faces. Any remaining torque will result in an additional wedge action between the locking screw and the inner member. Due to the very small resulting wedge angle any increased torsional force Ft will be transformed into a very strong axial clamping force Fa2.
The cross pin (not shown) helps in alignment of the PC screw prevents over tightening under heavy torsional loads.
| PC Size | Diameter" | MM |
|---|---|---|
| PC2 | .94 | 24 |
| PC3 | 1.22 | 31 |
| PC4 | 1.54 | 39 |
| PC5 | 1.97 | 50 |
| PC6 | 2.52 | 64 |
| PC7 | 3.54 | 90 |
| Part Number | Connection Size | Wrench | Tightening Torque |
|---|---|---|---|
| 880-002 | PC2 | 018-102 | 25 in. lbs. |
| 880-003 | PC3 | 018-103 | 42 in. lbs. |
| 880-004 | PC4 | 018-104 | 84 in. lbs. |
| 880-005 | PC5 | 018-105 | 168 in. lbs. |
| 880-006 | PC6 | 018-106 | 336 in. lbs. |
| 880-007 | PC7 | 018-107 | 840 in. lbs. |
Made in USA