STROKING PROCEDURE INTERNAL HONING
Put part at the center of the assembled mandrel unit and depress foot pedal slowly. Stoke part forward and back unit
and release foot pedal before removing part from honing unit.
Length of stroke is influenced by relation of the stone length to the length of the surface to be honed.
Parts should be stroked over the ends of the stone, by 1/4 to 1/2 the length of the part.
Proper stroking assures that the entire length of stones and mandrel shoes wear uniformly. It keeps both stone and
shoes true and make accurate holes easy to produce. Using too long a stroke or not overstroking consistently extends
farther over one end of the stone than the other, it will result in tapered holes and will tend to taper the honing unit.
Excessive truing will then be constantly required.
Note. The cross hatch surface pattern can be varied by changing the rate of stroking or the RPM of the honing unit.
Varying the frequency of stroking will speed stock removal in hard materials.
Blind Holes - see brochure supplied with item to be used.
TRUE IN THE STONE AND MANDREL
1. Slightly advance pressure control knob (to the left and below the spindle) depending upon the size of the honing
unit, predetermined by trial or as desired. Knob control is manufactured to run stiff. Do not try to loosen stiffness of knob
under normal use.
2. Turn feed knobs (calibrated know above spindle) counterclockwise to end of range. Adjust oil line to direct oil
down into drain pan. Apply honing oil sparingly to the stone, using a brush. The truing sleeve should be as near as
possible to the size of the hole to be honed in order that shoes seat in proper radius (never use a truing sleeve after it has
become larger than the range of the stone and mandrel unit). Slide the truing sleeve on unit and depress foot pedal until
foot pedal arm hits stop screw (attached to right front head bolt down screw). Next advance feed knob dial slightly.
Release foot pedal. Start motor, and while stroking truing sleeve forward and back on the unit, depress foot pedal slowly
until arm hits stop screw. Overstroke each end of the stone by 1/4 to 1/2 the length of the truing sleeve. Reverse truing
sleeve frequently. Always release foot pedal to stop rotation of honing unit before removing the truing sleeve. As part
trues in advance feed knob. Cutting pressure control can then be increased or decreased to suit feel and make proper
contact.
3. Use the truing sleeve sparingly. Excessive use of the truing sleeve causes undue wear. After a few reversals of
the sleeve, stop the machine and visually inspect the mandrel and stones. High spots on the stone will be loaded. Use a
diamond dresser or an abrasive dressing stick to remove high spots. High spots on guide shoes will be bright and shiny.
A few light strokes with a file will true most guide shoes; use an abrasive stick on hardened shoes. The truing sleeve thus
used acts as a straightedge and will last longer, and truing time will be reduced.
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