Kwik-Way Info Sheets

Valve Grinder Chuck Inspection

Chuck accuracy is critical to producing a quality valve job. Most O.E.M.'s require a valve face run-out to be below .0015. To accomplish this, the chuck in a valve grinder must not only run-out below .0015, but must repeat this every time. High performance engines require even greater accuracy. In some cases run-out must be below .0005. How do you determine the accuracy of the chuck in your machine? There is basically one easy method that can be used which provides an accurate evaluation.

Start by finding a known round and straight part. A valve seat pilot, carbide if you have one will work very well. If you do not have one, use a section of drill rod that is straight and round. This will be your test piece.

1. Insert the test piece into the chuck so that it is gripped correctly and has at least two inches of protrusion past the face of the chuck.
2. Install a dial indicator (.0000 reading if possible) so as to have the plunger contact the test piece one inch from the face of the chuck.
3. Turn the machine on and observe the indicator as the chuck is rotating. The reading at this point should not exceed .0015.

If the reading is inexcess of the .0015, you can first disassemble the chuck and clean it thoroughly. (Follow directions given in the machine manual). Examine the ramps on which the ball bearings ride, if wear is evident (grooves), the chuck will require placement. Kwik-Way provides new chucks that have less than .0005 run out and for the standard SVSIID and a Hi-Performance version with less than .0002 run out.

If you have any quesitons in regards to chuck performance, or if you need a replacement chuck, contact;

Kwik-Way Tech Services at 800-553-5953.

The Kwik-Way Heavy Duty Wheel Dresser

WHEELS commonly referred to as Seat Grinding Stones or Rocks.

The most common cause of wheel breakage is due to improper mounting and abusive and/or careless  operation.  Only  through  proper  use,  regular  grinding machine  maintenance,  service  and inspection procedures can wheel breakage be prevented.
 
It  is  the  responsibility  of  the  user  to  inspect,  at  regular  intervals,  to  be  certain  that  mounting flanges are in usable condition, are of proper size and shape and that no damage has occurred to the wheel or the machine.
 
The following DO'S and DONT'S should be used as a guide to safer grinding

WARNING
IMPROPER USE MAY CAUSE BREAKAGE AND SERIOUS INJURY.

KWIK-WAY WHEEL DRESSER SET-UP

1. Loosen handle #3 and rotate the pointer line until it aligns to the index angle desired and retighten.
2. After attaching the correct grinding wheel to the grinder unit, carefully lower the grinder unit onto the dresser arbor item #1
3. Loosen item #5 and raise or lower the arbor until the face of the wheel is in relative position to the diamond (#6). Retighten # 5
4. Adjust the diamond #6 by turning the knurled knob #2 until the diamond is nearly in contact to the face of the grinding wheel.
5. Engage the grinder motor hex drive to the hex cap on the grinder unit start the motor and begin  dressing  the  wheel  using  handle  #  4  and  slowly  sweeping  the  face.  (Follow  the directions below)

DRESSING OR TRUING THE VALVE SEAT WHEEL

It is necessary to true or dress seat wheels that have become dull or loaded, or have lost their form (angle). To obtain the best possible dress, observe the following.

1. Feed the diamond into the wheel very slowly until the diamond just touches the wheel.
2. Move the diamond across the face of the wheel beginning from the bottom and sweep up.  A slow sweep will provide a smoother finish while a rapid sweep will provide a coarse finish. 

NOTE: How  the  wheel  is  dressed  will  directly  influence the finish of the valve seat. Take care when dressing the seat wheels, this will improve valve seat finish and increase diamond life. Check the  dress  of  the  wheel  frequently  during  the  seat  grinding  operation.  It  is  better  to  dress frequently and remove a slight amount of wheel than to wait too long and have a necessity to remove an excessive amount to correct the wheel 

Changing a valve seat stone angle is only advised if it is to increase the stone angle, i.e., taking a 15-degree angle wheel and making it a 30-degree. 

It is not cost effective to attempt to reduce an angle, too much abrasive and diamond is required to perform this operation.