From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification sheet for a Brown & Sharpe Universal Grinding Machine.
| Identifier | ExFiles\Box 176\2\ img021 | |
| Date | 24th January 1940 guessed | |
| ELECTRICAL CONTROLS The magnetic controls are located within the base. Main push button switch at front of machine governs power supply to all motors. Wheel spindle, headstock and coolant pump motors started and stopped in unison through single magnetic switch. (Headstock spindle stopped separately by lever-operated clutch.) Two-speed table motor controlled by drum switch operated by knob at front. Motors protected by individual overload relays having automatic reset. Overload of any motor automatically stops entire machine. BASE Hollow. Rigidly braced internally. Supported at three points to preserve alignments. FLOOR SPACE At right angles to spindle, 60". Parallel to spindle, 209". STANDARD EQUIPMENT Wheel spindle motor, head-stock motor, table motor, coolant pump motor, electrical controls and wiring complete; pulleys and sheaves for obtaining speed changes of headstock and wheel spindle; No. 4M Internal Grinding Fixture; 8" 4-jawed independent chuck; face plate; face chuck; 2 grinding wheels—1 straight, 14" diameter, 1" thick, 5" hole, and 1 flaring cup, 14" diameter, 3/8" face, 1 1/2" thick, 5" hole; wheel puller; left-hand wheel sleeve and guard; wheel truing fixture; center rest; tooth rest and bracket; 2 universal back rests and 4 adjustable bronze shoes; set of telescopic water guards; set of work driving dogs; set of wrenches; and tool box. WEIGHTS AND SHIPPING DATA Machine fitted with motors* | Net Weight, Lbs. (Approx.) | Domestic Shipping Weight, Lbs. (Approx.) | Foreign Shipping Weight, Lbs. (Approx.) | Dimensions for Shipment, Inches | Space Occupied, Cu. Ft. ---|---|---|---|---|--- | 7470 | 7900 | 8225 | 130x49x49 | 181 *Because of the demand for quality finish, motors must be mounted at our factory. When furnished by customer, they must be balanced motors. The following additional equipment is available for use on the No. 4 Universal Grinding Machine (Motor Driven) at extra cost. Detailed specifications available on request.—Universal Head; Internal Grinding Fixtures; Internal Grinding Fixtures (Ball Bearing Type); Universal Back Rest; Radius Wheel Truing Attachment; Right-Hand Wheel Sleeve, Guard, and Spindle Sheave. [Image Callouts] Start-stop push-button switch governs power supply to all motors. Magnetic switch and overload relays enclosed in base. Motor-driven headstock; adjustable along table. Swivels. Has dead-center and revolving-spindle drive. Lever operates clutch and brake. Cross feed handwheel. Wide-spaced graduations read to .001" on work diameter. Knob engages 4:1 ratio for rapid movement. Table reversing lever; operated by finely-adjustable table dogs or by hand. Actuates automatic cross feed mechanism. Internal grinding fixture and wheel spindle driven from same motor by guarded belts. Fixture permanently mounted on wheel stand platen. Table handwheel, and lever for engaging either manual or automatic table travel. Knob operates drum switch for controlling 2-speed table motor. Motor drives 5-step cone pulley, giving 10 rates. [Machine Labels] BROWN & SHARPE ELECTRICAL CONTROLS No. 4 BROWN & SHARPE MFG. CO. PROVIDENCE, R.I., U.S.A. [Page Number] 3 | ||