Internal Cylindrical Grinding
Description
This section is from the book "Machine Shop Work", by Frederick W. Turner, Oscar E. Perrigo, Howard P. Fairfield. Also available from Amazon: Machine shop work.
Internal Cylindrical Grinding
Machine grinding the internal surfaces of gas engine cylinders may be used as a good example of this line of production work. Figs. 334 and 335 show two views of such work. It will be noted that these views illustrate one of several special internal grinding machines particularly designed for this class of work. The prominent feature in its design is that in place of rotating the work against the grinding wheel, the work is rigidly held in a fixed position. By means of a slow revolving
Fig. 329. Norton Grinder with 5i-Inch Face Wheel for Grinding Ford.
Axles and Drive Shafts
Fig. 330. Work Properly Supported.
Courtesy of Norton Grinding Company,
Worcester, Massachusetts
Figs 331 and 332. Set-Up for Grinding.
Straight and Contour Work with
Norton Grinder
Courtesy of "Machinery", New York City
Table XIV. Selection Of Grades
Class of Work | Alundum | Crystolon | ||
Grain | Grade | Grain | Grade | |
Aluminum castings | 36 to 46 | 3 to 4 Elas. | 20 to 24 | P to R |
Brass or bronze castings (large) | ......... | ............ | 20 to 24 | Q to R |
Brass or bronze castings (small) | ......... | ............. | 24 to 36 | P to R |
Brick, fire | .......... | ............. | 16 to 20 | P to Q |
Brick, pressed | ........... | ............ | 16 to 20 | O to P |
Car wheels, cast iron | ............ | ........ | 16 to 24 | P to Q |
Car wheels, chilled | 20 | Q | 16 to 24 | O to Q |
Cast iron, cylindrical | 24 comb. | J to K | 30 to 46 | J to L |
Cast iron, surfacing | 20 to 46 | H to K | 16 to 30 | J to L |
Cast iron (small) castings | 24 to 30 | P to R | 20 to 30 | Q to S |
Cast iron (large) castings | 16 to 20 | Q to R | 16 to 24 | Q to S |
Chilled iron castings | 20 to 30 | P to U | 20 to 30 | Q |
Dies, chilled iron | ......... | ........... | 20 to 30 | O to Q |
Dies, steel | 36 to 60 | J to L | ||
Drop forgings | 20 to 30 | P to R | .... | ........... |
Hammers, cast steel | 30 | P | ........... | ........... |
Hollowware, inside grinding | ........... | 30 | Q | |
Hollowware, thin edges | ......... | ........... | 24 | U |
Internal grinding of automobile cylinders (cast iron) | ......... | ........... | 30 to 60 | I to L |
Internal grinding, hardened steel | 46 to 60 | J to M | ........... | ........... |
Knives (paper), automatic grinding | 36 to 46 | J to K | ........... | ........... |
Knives (planer), automatic grinding | 30 to 46 | J to K | ........... | ........... |
Knives, leather shaving | 60 | N to O | ........... | ........... |
Knives, leather splitting | 24 to 30 | 1 to 2 Elas. | ........... | ........... |
Knives, molding bits, etc. | 46 to 60 | 3 Elas. | ........... | ........... |
46 to 60 | M | ........... | ........... | |
Knives (planing mill), hand grinding | 46 to 60 | J to M | ........... | ........... |
Knives, shear and shear blades | 30 to 60 | J to M | ........... | ........... |
Knives, shoe | 60 | M | ........... | ........... |
Lathe centers | 46 to 120 | J to M | ........... | ........... |
Lathe and planer tools | 20 to 24 | P Sil. | ........... | ........... |
20 to 36 | O toP | ........... | ........... | |
Machine shop use, general | 20 to 36 | O to Q | ........... | ........... |
Malleable iron castings (large) | 14 to 20 | P to U | 16 to 20 | R to S |
Malleable iron castings (small) | 20 to 30 | P to R | 20 to 30 | Q to S |
Marble, finishing | ........... | 150 to F | M | |
Marble, roughing | ......... | ........... | 16 to 46 | M |
Marble, coping | ......... | ........... | 36 to 46 | O to S |
Marble, molding | ......... | ........... | 4 | 0 |
Milling cutters, automatic or semi-automatic grinding | 46 to 60 | H to M | ........... | ........... |
Milling cutters, hand grinding | 46 to 60 | J to M | ........... | ........... |
Nickel castings | 20 to 24 | P to Q | 20 to 24 | R |
Pearl grinding, roughing | ......... | ........... | 30 to 50 | P to U |
Pearl grinding, finishing | ........... | ........... | 100 to 150 | M to P |
Plow bodies (cast iron), surfacing | ........... | ........... | 24 | R |
Plows (steel), jointing | 20 to 24 | R to S | ........... | ........... |
Plow points (chilled iron), surfacing | ........... | ........... | 20 to 30 | Q to S |
Plows (steel), surfacing | 16 to 24 | Q to S | ........... | ........... |
Porcelain, roughing | ........... | ........... | 36 to 50 | O to R |
Pulleys (e i), surfacing faces of | ........... | ........... | 30 to 36 | K to L |
Radiators (cast iron), edges of | ........... | ........... | 24 to 30 | R to S |
Razors, grinding and concaving | 46 to 120 | H to O | ........... | ........... |
46 to 60 | K to O | ........... | ........... | |
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