¾" CORE DRILL AND BIT COMBO™  
User Instructions

This bit combines a ¾" core drill and a ¾" a WB-1 standard grit grinding head to create a multi-tasking single bit that is both convenient and cost effective.

Safety

• It is extremely important to wear proper eye protection when using any glass grinder. We highly recommend that you wear safety goggles rather than safety glass. The GrinderStation™ is not designed to provide eye protection. You can also add the Inland FaceShield^™ or MagnaShield^™ in conjunction with proper eye wear for added protection: A shield alone is not adequate eye protection.
• DO NOT wear loose clothing or any accessories (long necklaces, bracelets, shirts with long fringes, and similar) that might get caught by the grinder head while using any Inland grinder.
• Use your machine only in a properly grounded and tested outlet. Under NO circumstances should you override the grounding system or modify the plug.
• Set up your machine on a sturdy, level work surface that is water tolerant and a comfortable height to work on
• Do not sit your grinder in a pan, on a towel or carpeting.

Instructions

1. Apply a thin coating of Inland Motor Shaft Lubricant™ (#50022) to the motor shaft. Our Teflon based lubricant helps prevent the bit from seizing on the shaft and seals out ground glass particles. In a pinch, you can use a bit of Vaseline. 
2. Loosen the set screw on the bit by turning it counterclockwise with one of the black allen wrenches. To have access to both the core drilling portion and standard grinding section you must mount this bit "upside down". You can also mount it like any regular bit and then flip it when you need to use the core portion. Either way, slide the bit down onto the motor shaft, positioning the set screw over the flat side of the motor shaft. Bits should slide on easily. Do not force! Contact customer service if you have problems. 
3. Position the bit down so that you are using the bottom most section of the ¾" diamond section. Secure in place by turning the set screw clockwise with the allen wrench. IMPORTANT: Always secure the bit to the flat side of the motor shaft. Tightening the bit to the rounded side can scar the shaft and prevent bit removal!
4. To use the WB-1 portion of the bit turn on the machine and start grinding a piece of scrap glass to get a `feel' for the grinding action. Begin by pushing the glass into the grinding bit using light pressure and moving the glass back and forth across the bit. Slowly increase the pressure until you feel comfortable with the grinding speed and your control. You'll quickly learn the optimum grinding pressure for the types of glass you use. When grinding out deep cuts, use intermittent pressure to allow coolant to rinse ground glass from the head. If you ever have a white paste form on the bit, it is not getting enough coolant. Stop and check the sponge placement and coolant level. Grinding without coolant greatly reduces the life of your grinding heads.
5. To use the core drilling portion of the bit you will need to apply coolant to the bit head while drilling. Begin drilling the hole by holding the front surface of the glass against the upper edge of the bit at about a 45^° angle, with the coolant soaked sponge held against both the bit and glass. (You may want to use two hands). Start the machine and slowly move the glass down onto the bit to a horizontal position. Continue to work the glass down and around the bit top in a circular motion, making sure to keep the glass and bit surface wet at all times. You may need to stop and reload the sponge several times. Ease up on the pressure as you begin to see the bit come through the back of the glass to help reduce chipping. It is advisable to practice on a piece of scrap glass before you begin drilling on your final project.

Maintenance

1. Apply Inland Motor Shaft Lubricant (#50022) to the shaft whenever changing or removing grinding heads. Remove the head if you won’t be using the grinder for more than a week. 
2. Tighten grinding head set screws ONLY to the flat side of the motor shaft to prevent scaring the shaft which makes removing the head nearly impossible. Never force a bit onto the shaft and never pry off a bit. If the bit is stuck, contact Inland Customer service for instructions at 1-800-521-8427, ext. 306 
3. Never use your diamond grinding bits without proper lubrication. Failure to do so will result in premature wearing of the diamond surface.

Service

If you have any questions or comments regarding the use of this or any Inland product please call Inland Customer Service at 1-800-521-8428 9 AM to 5 PM EST., email us, or write us at:

Inland Craft Products, Co. 32052 Edward Madison Heights, MI 48071

Document No. 3000/QF/--- Rev No. 1