Rottler HP6A - Method 1; Cast Iron Rings or Tougher Duty Cycle Applications; Method 2; Moly Rings or Shorter Duty Cycle Engine Applications

Operating Instructions 3-5 HP6A Manual
Following are two slightly different methods for achieving the above finish. They differ slightly depending
on the end use of the engine.
Method 1
Cast Iron Rings or Tougher Duty Cycle Applications
This finish is used for cast iron rings or with moly rings where the end use of the engine is for tough or
long duty cycle application – dirt track racing or standard automotive use.
Step One:
Use part number 514-9-14K (170/200grit) diamond stones. Use a roughing load of
50% and a finishing load of 20%. Hone the cylinder to size.
Step Two:
Use part number 514-9-14L for 5 strokes in each cylinder. You can use the brushing mode or make sure
you have 20% load on these stones. Caution do not hone longer than 5 strokes or shorter than 5 strokes.
This will affect your overall finish.
Step Three:
After using the 514-9-14L stones now install the 514-9-14H brushes for plateau finishing. Use brush
setting on machine and brush each cylinder 3 strokes.
Method 2
Moly Rings or Shorter Duty Cycle Engine Applications
This finish is used with moly rings where the end use of the engine is for short duty cycles such as drag
racing.
Step One:
Use part number 514-9-14J (270/325grit) diamond stones. Use a roughing load of 50% and a finishing
load of 20%. Hone the cylinder to size.
Step Two:
Use part number 514-9-14L for 5 strokes in each cylinder. You can use the brushing mode or make sure
you have 20% load on these stones. Caution do not hone longer than 5 strokes or shorter than 5 strokes.
This will affect your overall finish.
Step Three:
Now install the 514-9-14H brushes for plateau finishing. Use brush setting on machine and brush each
cylinder 3 strokes.
Productivity:
Whether using vitrified or diamond abrasives, the honing process should be studied to maximize the
productivity of the work center while providing the desired end result. Following is an example of two
different ways to accomplish the same end result of an 18-22 Ra non-plateau finish. The customer
requires .003 in./.07mm stock removal for honing after boring.
Single Step Honing:
Process:
Abrasive: Diamond 500 Grit.
Set machine stop to hone to size. 60 strokes per minute. Set the roughing load at 85%. Set the finishing
load between 25 and 35%. At .0003 in./.007mm per feed out a stock removal rate of .0015 in./.038mm
per minute is achieved. The result is 2 minutes of honing time per cylinder.