CBN ELECTROPLATED BROACH GRINDING WHEELS

CBN plated grinding wheels…a highly productive alternative to aluminum oxide wheels for the sharpening of broach gullets. These wheels can be used on your conventional broach grinder without modification, however, for best results, equipment of rigid construction with a good spindle should be used. While wheel life is best when coolant is used, the operation can be done dry. The aggressive, free-cutting CBN superabrasive generates little heat. This is especially important in dry grinding. You will find these CBN wheels to be a very efficient and costeffective way to grind broaches.

Guidelines for Using Superabrasive Grinding Wheels

Listed below are some major factors that need to be considered when designing a metal removal process which will incorporate the use of diamond or CBN wheels.

• Machine tool quality

• Machine feed parameters

• Grinding wheel speeds

• Grinding fluids

Optimization of the grinding process with respect to these factors will increase the performance of the CBN wheel and lower the overall grinding costs

Machine Tool Quality

• Rigidity

• Accuracy of feed systems

• Adequate power

• Fluid delivery and filtration

Advantages of CBN Broach Wheels

Enables aggressive grinding with minimal burnishing
Keeps the broach cooler during operation
No dressing required
Offers significant cost savings – the wheel is recycled, not discarded
Available in various forms and a wide range of grit sizes

CBN Broach Wheels Specifications

Diameter: 5″ and 6″
Width: 0.25″ to 0.75″
Available Grit Sizes:
- 80/100
- 100/120
- 120/140

Strip and Replate Service

Engis provides strip and replate services for all electroplated grinding wheels.

Good spindle bearings, as well as tight and accurate ways and feed screws, are a must for effective performance. Varying the downfeed, infeed, crossfeed and workspeed with respect to each other will affect a wheel’s life, workpiece surface finish and integrity, geometric accuracy of the part and cost effectiveness of the operation.

Electroplated wheels can be run safely at peripheral speeds up to 25,000 SFPM. Running at these higher speeds will increase the overall efficiency of the grinding operation and could even double the wheel life.

Diamond and CBN wheels provide the most outstanding performance when used with lubricating type fluids without water, however, the method by which it is applied can have a dramatic effect on the performance. A high pressure fluid delivery system pumped under pressures of 300-1,000 PSI to nozzles located near the grinding wheel should be considered for severe grinding conditions.

CBN ELECTROPLATED BROACH GRINDING WHEELS

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