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Established In 1981
Diamond Cylinder Honing Computer
   Controlled Rough and Finish
Rottler HP7A Cylinder Hone
Today's Standards are becoming more demanding

Progressive engine builders must be responsive to the dynamic changes in the industry. With the latest model ring seating requirements and the diverse number of block configurations, the machinist needs the versatility offered by Rottler H Series honing machines. Cylinder finish is becoming a science as the demands continue to grow. Graphical representation of the cylinder finish, such as that displayed on an Abbott-Firestone Curve, provide a qualitative analysis of the characteristics of the surface finish. The Rk family of parameters directly portrays the surface characteristics over a given sampling length.


Another Industry First From Rottler

The HP7A is the first automated cylinder honing machine capable of operating under two automatic program modes.

1. Automatic Stone Feed Out

By setting the number of strokes per feed in conjunction with the total amount to be removed, the operator can hone a cylinder completely unattended. The feed rate can be adjusted anytime during the honing process.

2. Automatic Load Sensing

By setting the desired load pressure in conjunction with the total amount to be removed cylinders can be honed to size accurately, without the need for operator attendance. An industry first! In addition, under high speed automatic operation the machine adjusts to a desirable speed to properly finish the cylinder just before stopping. Enter the load into the computer and the machine automatically maintains this value while it finishes the cylinder.

Setting the stroke is very efficient with the use of the upper and lower limit levers. The positive feed system on Rottler HP machine ensures controlled, precise expansion of the stones.

Rottler has responded to the dynamic needs of today's engine builder by offering the simplest controlled method of finishing cylinders. Turn difficult jobs into dollars. Specific features include:

• Independent Stroke and Spindle drives

Achieve the desired crosshatch efficiently. Stop anywhere in the cylinder.

• Computor CNC Control Operation

Feed settings can be adjusted even while the machine is running.

• Block Clamp Arms

Rottler's superior fixturing allows work pieces without main lines to be fixtures easily.

• Infinitely Variable Speeds and Feeds

Varying the spindle rpm is as easy as the turn of a dial... set your desired operating speed.


Achieve unmatched accuracy and control with Rottler's Heavy Duty Precision Hone Head. This system not only maintains superior accuracy, but is also effective in aggressive stock removal. The Precision Hone Head was developed to provide excellent abrasive tool support and rigidity.

• Provides superior accuracy

• Fast hole geometry correction with minimal stock removal

• Aggressive stock removal from .004 to .012 per minute


• Large capacity for machining diesel blocks

Computer Controlled Rough and Finish Load
Coolant eliminates heat and distortion.
Soft brush cycle completes the plateau honing process.
Rottler HP7A Diamond Cylinder Hone