Remove the nuts, wheels, and cup washers from the axle. • Several 3/4″- (19mm-) diameter adhesive paper dots (price marking dots work well) A mark that runs ≥75% of the way around the wheel is acceptable. Loosen the axle nut about 1/4″ away from the outboard washer. The right side has a right-hand thread, and the left side, a left-hand thread. Shims also need to be installed on the inboard side, 180° from the outboard location. The Occupational Safety and Health Administration (OSHA), which regulates worker safety in commercial and educational facilities, recommends testing the integrity of a grinding wheel by performing a ring test prior to mounting. Continue to use the truing device exclusively to maintain concentricity of the wheels and smooth and deglaze the outer surfaces of the wheels. Position the diamond so it barely touches the face of the wheel. Never attempt to adjust the size of the hole in the wheel; if the bushing does not fit, try another bushing and/or wheel. Reducing Bench Grinder Vibration. 5. The performance of your bench grinder can Keep in mind only so much adjustment is available. September 2019. Many grinders have stamped Repeat the same procedure on the other wheel. Never attempt to correct side-to-side wheel wobble by dressing, or truing, the sides of the wheel—a very dangerous practice. Most 8″ (20cm) bench grinders have a 5/8″ (16mm) shaft diameter (some have a 3/4″ shaft). An 80- to 120-grit wheel is a good choice for sharpening most woodturning tools, and a 46-grit wheel is good for producing a burr on scrapers and for rough shaping tools. Move the diamond away from the wheel and start the grinder. can stop the flange washer from seating properly. dress the wheel. 3. Note that when installing a steel bushing, do not force it into the wheel’s hole. (De-glazing is the removal of clogged metal particles.) This can be removed by using This article, “Tuning Up a Bench Grinder,” by Don Geiger, is from the pages of American Woodturner and is brought to you by the America Association of Woodturners (AAW) in partnership with Woodworker’s Journal.. How to Tune Up a Bench Grinder. To correct this be improved with just a few simple tune-up steps. If your wheel-truing device utilizes a tool-rest for support, position the tool-rest within ⅛” of the wheel. Bench grinders are a great addition to any shop. Woodturners use finer This article, “Tuning Up a Bench Grinder,” by Don Geiger, is from the pages of American Woodturner and is brought to you by the America Association of Woodturners (AAW) in partnership with Woodworker’s Journal. A slight burr on the edge of the shoulder Tools and supplies you will need to tune up a grinder as described in this article are as follows: • Two ring-shaped card stock disks with an outside diameter about 1/4″ (6mm) smaller than your wheel and an inside diameter about 1/2″ (13mm) larger than the cup washers on your grinder Using Bench Grinder to sharpen a drill bit One easy and effective way to achieve the goal is to use a bench grinder. A “K” hardness wheel is ideal for sharpening most woodturning tools. flange washers, and check the shoulder on the motor shaft at the point where Note: Use only paper shims; hard shims such as metal, wood, or plastic can concentrate too much pressure, possibly cracking the wheel, and could become a safety hazard if they fly out while the grinder is running. Remove any rust and debris. Install a stack of about five dots for severe cases and fewer for less severe wobble. He lives in Newberry, Florida. This rotation can minimize any The plastic bushings are usually loose fitting, which allows the mass of the wheel to be mounted off center — a major source of vibration. This type of vibration is easily recognized because it leaves evenly spaced dark spots on the surface of the wheel—solid evidence that the wheel is not concentric to the grinder’s axle. It is advisable to chamfer this edge as well. When you want to get rid of the vibrations that happen with bench grinders you need to do a little investigative work. 4. grinding wheel manufacturers are designed to roughly center the wheel on the Rotate the wheel by hand to ensure it clears the tool-rest. Darin Lawrence, Woodcraft Director of Product Development Posted on, ALL OF THE DEALS, ALL IN ONE PLACE - WOODCRAFT HOLIDAY HQ. If yours produces significant vibration and your tools bounce on the surface of the wheels, there is a problem. Article by Rockler Woodworking and Hardware. These are available from several sources to fit perfectly over a 5/8″ diameter axle (though I am not aware of any sources for stabilizers designed to fit a 3/4″ shaft). Bench grinders are a great addition to Polishing compound sticks are color coded to indicate the grit, from coarse to very fine. With the flange washers adjusted and holding the wheel, the next step is Install an equal number of shims between the outboard cup washer and the wheel precisely at the center of the pencil line marked earlier. Observe any change. You’ll also need a set of polishing compound sticks ($14). The vibration of the grinder will be minimized and tools will not bounce on the surface of the wheels. any shop. A well-tuned grinder will produce a better edge on your turning tools. Surface grinder wheels are mounted on solid hubs which are then mounted on the tapered motor arbor very similar to what I originally proposed. Wheel hardness is rated on a scale from A to Z, with A being the softest. Re: Tuning up a bench grinder Post by GlennW » Thu Oct 27, 2011 1:10 pm If I was making flanges to mount the wheels, I believe I would just go ahead and make an adapter to accept standard 8" x 3/4" or 1" x 1 1/4" tool room wheels. Log In. Note that the nuts on either end of the axle have opposing threads. the flange washer seats against it. A well-tuned grinder will produce a better edge on your turning tools. Wheel truing systems feature a single diamond, whose position, relative to the wheel, is controlled and micro-adjustable. Most bench grinders, whether outfitted with 6" or 8" wheels, come ill-equipped from the factory for use in a woodworking shop, thanks to stone wheels that prove too coarse for sharpening fine-cutting tools, clumsy tool rests, and accessories that are inadequate or just not helpful. Repeat as necessary until the diamond has contacted the entire circumference and width of the wheel. • A wheel truing/dressing device with a mechanically guided single diamond that is micro-adjustable Once the tune-up procedure is complete, your grinder should perform with optimal results. and spin the wheel by hand. Don markets several of his own inventions and is a dealer for Robust Tools, LLC. The bench grinder is the undergraduate philosophy major of the workshop: a machine that's obvious, abrasive, and designed to grind every item it … 3. problem, first make a reference mark on each flange washer and the wheel to If cracked, there will be a dead sound, and the wheel should not be used. Re-test the apex of the wobble using the pencil marking method as before. shaft. A bench grinder fitted with a wire wheel ($15) on one side and a cotton buffing wheel ($8) on the other side, or buffing wheels on both sides, makes a great cleaning and polishing tool. The top surface of the tool-rest needs to be pointing at the axle of the grinder or slightly downward. The sound of an undamaged wheel will give a clear ringing tone. Excessive tightening could result in breaking the wheel. Most wheel manufacturers recommend tightening the nuts to 8 to 10 footpounds of torque. When you need to remove steel quickly, a bench grinder is your primary machine.