Troubleshooting Tips: Centerless Grinding Concave work (low center)`, Work guides on entrance and exit sides deflected toward the grinding wheel. Also see . Centerless grinders are the dependable workhorses of the manufacturing world. With regular maintenance and TLC, your centerless grinding. Achieving consistent and quality results from the centerless grinding process requires an understanding of the basic fundamentals. Most application problems .

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Dress with sharp diamond at increased traverse rate. Work too high above centre. If impossible to change machine location, mount grinder on some vibration insulating material. Use coarser grain size and softer grade.

Loose diamond holder ; loose or cracked diamond. When two are used constant soaking and drying out may eventually cause loosening of cap screws. Dress wheel face parallel to work piece to prevent leading or trailing edge from digging in.

Uneven fine lines on work piece due to faulty dressing Do not allow diamond to dwell on wheel. Allow grinding stock equal to approximately three times amount of run out.

Make certain cap screws troublesbooting tight in mount. If in feed screw is under strain either way any considerable jar on machine, such as from a passing industrial truck, troublsshooting trip hammer or a light blow to machine, etc. Increase traverse or in feed rate to make wheel act softer. Clean coolant tank and machine. Incorrect dressing of grinding wheel Turn diamond to avoid fiat spot or replace with new one. Decrease work speed regulating wheel. troubleshooging


Take lighter cuts when grinding. Motor bearing defective or armature out of balance. Immediately upon receipt, all grinding wheels should be closely inspected for possible damage in troublesohoting. Even fine spiral diamond lines Dress at slower traverse rate. Wavy traverse lines due to faulty dressing, leaving ragged wheel edges. Always balance wheel in following sequence:.

Troubleshooting | Noritake Co., Ltd.

Stock removal too heavy on roughing cuts. Uneven, or evenly spaced lines on work piece due to extraneous vibrations If impossible to change machine location, mount grinder on some vibration insulating material. Wheel should be just a nice sliding fit Maximum clearance of 0. Also, the same cause may produce a varied number of grinding problems. Use coolant filter for fine finishes. Make certain support slot free of dirt before inserting blade. Angle on work blade too low Gradually increase blade angle until right Loose or tight regulating wheel chain will cause periodic or intermittent flats on work piece.

Rotate or change diamond to—get sharper dressing. Irregular scratches of various lengths and sizes due to dirty coolant.

Grinding Troubleshooting

Reset gib on truing device. Tighten diamond holder clamping screw; reset or replace diamond. Under each are listed probable causes, and under each cause, possible corrections. Incorrect wheel for particular job.


Loose regulating wheel spindle bearings. Bowed short piece, about twice length of wheel face. Straighten in press before grinding.

Wash wheel thoroughly with coolant after dressing. Grain marks due to too soft or coarse a wheel. Insufficient coolant when grinding tubing or other hollow work such as pistons, etc Increase flow of coolant at point of contact. However, increasing truing angle and re truing wheel without changing housing angle can attain same result. Change the grinding cycle Correct the center hole by grinding it Replace the dresser with a new one. Grinding pressures too high. Copyright Midland Abrasives.

Work not straightened sufficiently before grinding Make certain it is straightened on presses before grinding. Keep flange screws tight at all times.

Slow down traverse and work speeds, trobuleshooting work pressure. Rough grind with more and smaller cuts, or use harder wheel for roughing. Scale from hardened work, or dirty oil, solder, welding flux, etc. Wheel too soft—use harder grade.

Diamond holder loose; tighten clamping screw. Below, are rroubleshooting problems, which may be encountered whilst grinding. Too great a difference in grain size between roughing and finishing wheels.