Mine Safety & Health Administration, Branch of Acquisition Management, PO Box 25367, Denver, CO 80225-0367

66 -- TORQUE-THRUST-ROTATION SENSOR AND READOUT UNIT Sol J2754012 Due 082495 Contact Kathy Viglione, 303/231-5405 Torque-Thrust-Rotation Sensor and Readout Unit to evaluate installation characteristics of roof bolts in mines. Rated capacities: thrust - 15,000 lbs; torque - 9,000 in. lbs; overload capacity - 150% of rated; speed rating - 1200 rpm. Output: 2 mv/v nominal at rated capacity; Non-linearity: 0.25% of rated output; Hysteresis: 0.25% of rated output; Repeatability: 0.10% of reading; Crosstalk: with one axis fully loaded and the other axis loaded, any error signal induced in the unloaded axis should not exceed 2% of rated output; Size: length - no greater than 12'', diameter - no greater than 6'', shaft - 1 1/8'' square male/female ends, with 3/4'' diameter through hole; Operational environment: compatible for use in underground mines, unaffected by dust and moisture; Heavy duty aluminum carrying case, foam filled; Readout Unit Input: triple input capability; Output: (1) Simultaneous digital readout of torque (1 ft-lb increments), thrust (1 or 10 lb increments) and speed (1 rpm increments) up to rated capacities of sensor, (2) Available analog output voltages which can be used to drive external devices such as X/Y plotters and strip chart recorders; Display Options: current and peak values; Display Accuracy: 0.1%; Power Sources: internal rechargeable battery w/low battery indicator and 110v AC; Size: length - no greater than 15'', width - no greater than 12'', height - no greater than 6''; Operational Environment: compatible for use in underground mines, unaffected by dust and moisture; Carrying case: will not add more than 1'' to any dimension of the readout unit and allow for use of the unit without removal from case. All responsible sources may submit an offer. Requests must be by mail, or fax request to Donna Wendell, (303) 231-5545. See numbered Note 22 (207)

Loren Data Corp. http://www.ld.com (SYN# 0416 19950728\66-0007.SOL)