THE REV ® SYSTEM
FOR CNC LATHES
THE MAIN FEATURE OF THE REV ® SYSTEM FOR CNC LATHES IS THE ECCENTRIC BUSHING PATENTED BY REV ® S.R.L. (Patent no.1.394.481) allowing any lathe without a Y-axis to perform broaching or slotting operations perfectly aligned with the workpiece. lt is made with tool steel which is then hardened and graund. It's always necessary obtain a broaching process
perfectly centered with the workpiece. Almost always this operations have a few hundredths of millimeters of tolerance with the
center position. The error may be due to a coupling error or an alignment error of the turret with the center of the spindle. The REV ® eccentric bushing provide the possibity to make a centesimal correction of the tool position with a range rotation of 0.5 in Y+ and 0.5 in Y-. This range of adjustment is enough to eliminate any alignment error. A graduated scale is engraved on the front of the bushing, where each notch marks a shift of 0.03 mm. When the first workpiece has been broached and the error is detected, the operator will able to easly apply the correction moving the bushing in one direction or the other, to eliminate it. The eccentric bushing is only required if the CNC lathe does not have the Y axis. lf, the lathe is equipped with the Y, the eccentric bushing must not be installed and the CNC functions are used to set up the exact position.
ASSEMBLY ON CNC LATHES
House the insert in the tool and clamp in on by tightening the Torx screw with the screwdriver. House the tool inside the eccentric bushing and align the white notch engraved on the tool collar with O on the front of the bushing; then, tighten the clamping screw positioned radially on the bushing collar, to lock the tool to the bushing. lnsert the unit composed of bushing and tool inside the lathe's boring bar hatch, tighten the screw with the spherical end inside the centering graove on the tool's flat, being careful not to completely block the tool, and finally tighten the two flat point grub screws.
CORRECTING ALIGNMENT ERRORS WITH THE REV ® BUSHING lf there is an alignment error that needs to be corrected, perform the following operations: Start by loosening the flat point grub screws that hold the tool in the boring bar and the grub screw positioned radially in the collar of the eccentric bushing, turn the eccentric bushing in the apposite direction of the error; it basically acts as a Y axis, moving the tool in Y+ and Y-. Each notch engraved on the bushing is equal to 0.03 mm.
CHECKS AND ADJUSTMENTS
When the first key has been processed, one of the ways to check the alignment is to fit a Johansson block, without play, in the keyway realized and, use a gauge to take the measurement between the end of the diameter and the wall of the Johansson block. In the example provided in Fig. 1 the measured value 8.50 mm is correct, while in Fig.2 the measured value is 8.35 mm on one side and 8.65 on the other, resulting in an alignment error of 0.15 mm that needs to be corrected.
Tighten the clamping grub screw positioned radially on the bushing collar back up, followed by all of the other screws on the boring bar hatch. We advise you to always observe the recommended parameters and suggestions.In the example provided above it would have been necessary to rotate the eccentric bushing by five notches to correct the alignment.
Fig.1
Fig.2
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GENERAL CATALOGUE 2026
THE REV ® SYSTEM
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