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Title: |
1902 Article-C. H. Besly & Co., Disc Grinder |
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Source: |
The Iron Age, 13 Nov 1902 pg 16 |
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Insert Date: |
10/6/2011 7:02:54 PM |
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The Gardner Motor Driven Grinder — The high speed at which it is desirable to run grinding machinery affords one of the best opportunities for the application of electricity as a motive power. Chas. H. Besly & Co., Chicago, were one of the first to recognize this fact and early adopted the motor as the most effective means of running the Gardner grinder. The accompanying illustration shows the new electric type of grinder, the motor being placed centrally between the two spirally grooved disks which form the most prominent feature of the tool. These disks are of steel, and have a spiral, rectangular groove running from near the center to the circumference of the wheel, this groove being cut on each face of the wheel. The groove is 3/64 inch wide and 1/32 inch deep, there being about five grooves to the inch of radius. The grooves serve to hold the emery paper or cloth, which is glued to the disks, securely and communicate a corrugated or ribbed surface to the emery. By this device the cutting efficiency of the disk is increased, and it has been found by practice that the temperature generated by friction is modified by the currents of air which pass between the face of the disk and the material being ground. To insure holding the piece being ground in a correct position adjustable tables are provided suited for different kinds of work. The spindles carrying the disks are made of crucible stool and run in adjustable cast iron bearings having a proportionately large surface. Compression cups are also provided for lubrication. The motor is 5 horse-power of the Crocker Wheeler type. |
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