1、 A-A-59244 9038054 0000629 089 = INCH-POUND A-A-59244 June 16.1998 SUPERSEDING November 12, 1992 00-D-2776 COMMERCIAL ITEM DESCRIPTION DRILL, PNEUMATIC DRIFTER, SELF-PROPELLED, CRAWLER MOUNTED WCK DRILL) The General Services Administration has authorized the use of this commercial item description f
2、or all Federal agencies. 1. SCOPE. This commercial item description (CD) covers two types of self-propelled, crawler mounted, drifter drills (referred to hereinafter as “track drill”), having not less than a 4.75-inch (121 millimetre (mm) cylinder bore. The track drills are used for horizontai and v
3、ertical drilling to define crevice lines, to drill blast holes, and to accomplish other miscellaneous drilling jobs. 2. CLASSIFICATION. The track drills covered by this CID are classified by the method utilized for rotation of the pneumatic drifter drill and are classified as specified (see 7.2): Ty
4、pe1 - Riflebar. Type II - Independent air motor drive. 3. SALIENT CHARACTERISTICS. 3.1 Description. The track drill shall consist of a crawler chassis with a pintle attachment for towing an air compressor, along with the following: a. Air motors. b. Dust suppression system. c. Hydraulically-operated
5、 swing type boom. d. Chain-fed type drill retainer channel. e. Either an independent air motor or rifle bar rotation type pneumatic drifter drill. Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Officer
6、In Charge (Code 15E2), Seabee Logistics Center, 41 11 San Pedro St., Port Hueneme, CA 93043-4410, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 3820 Provided by IHSNot for ResaleNo reproduction or networking
7、 permitted without license from IHS-,-,-A - A-5 92 4 4 m 90l18054 0000630 8TO m A-A-59244 The track drill shall be provided with lubrication fittings, hoses, controls, crawler brakes or locks, and other necessary items to perform complete and efficient drilling operations. The track drill shall use
8、compressed air from the towed air compressor as a power source for propulsion and drilling. 3.2 Standard commercial moduct. The track drills shall, as a minimum, be in accordance with the requirements of this CID and shall be the manufacturers standard commercial product. Additional or better featur
9、es which are not specifically prohibited by this CID but which are a part of the manufacturers standard commercial product, shall be included in the track drill being furnished. A standard commercial product is a product which has been sold or is being currently offered for sale on the commercial ma
10、rket through advertisements or manufacturers catalogs, or brochures, and represents the latest production model. 3.3 Interchangeability. All track drills of the same classification furnished with similar options under a specific contract shall be identical to the extent necessary to ensure interchan
11、geability of component parts, assemblies, accessories, and spare parts. 3.4 Design and construction. 3.4.1 Safety. Except for the drill steel, feed chain, and crawler track assembly, all rotating or reciprocating parts that are hazardous to operating personnel shall be enclosed or guarded. 3.4.2 Noi
12、se warning plate. A warning plate made of corrosion-resistant material, which will last and remain legible for the life of the equipment, shall be securely affixed with nonferrous screws, rivets, or bolts to a location conspicuous from the control panel. The plate shall have a yellow background with
13、 black lettering inscribed as follows: CAUTION EAR PROTECTION REQUIRED WHEN EQUIPMENT IS OPERATING 3.4.3 Ease of maintenance. All major assemblies and installed attachments shall be readily accessible for servicing, repair, or replacement. Drainage of lubricants and hydraulic fluid shall be to the g
14、round without draining on or over any part of the track drill. When drain outlets are located over parts of the track drill, integral tubes or pipes shall convey the fluid from the drain to the ground. Drain outlets shall be accessible without the removal or adjustment of accessories or parts other
15、than access opening covers. 3.4.4 Crawler chassis. The track drill shall be mounted on a self-propelled crawler chassis consisting of two oscillating crawler tracks. The crawler chassis shall have a ground clearance of not less than 10 inches (254 mm). The crawler mounting shall permit tracks to ris
16、e over obstructions while maintaining a proportionately level platform when traveling or drilling. The vertical oscillation of the track frame shall be not less than 14 inches (356 mm), measured at the center of the front idler. Heavyduty recoil springs shall be furnished for cushioning front idlers
17、. Track rollers and the track rail shall be arranged to prevent damage to bearings or grease fittings 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59244 when the track drill is operated through abrasive material or loose stone. The track dri
18、ll shall be equipped with track adjusters or maintaining tension on the track. Track frames shall not be spliced. The track gage shall be not less than 70 inches (1 778 mm) fiom center to center of tracks and a ground bearing length of not less than 60 inches (1 524 mm). 3.4.4.1 Track chain. Train l
19、inks and grouser shoes shall be heat-treated steel of drop-forged or roller construction. The shoes shall be not less than 10 inches (254 mm) wide With provisions for affixing rubber crawler-iread pads. Track links shall be equipped with replaceable pins and bushings. The master pin shall be secured
20、 by a lock or a press fit and shall be identified. 3.4.4.2 Tramming air motors. A tramming air motor using a gear drive train or chain drive, shall drive each track. Each motor shall have a spring-loaded deadman control for forward and reverse movement of the track. The motor and drive train shall b
21、e enclosed. Adequate vent plugs shall be provided to prevent air pressure build-up in track drive housing. The rated horsepower (watt (W) of the air motors at 90 pound-force per square inch (psi) (621 kilopascal Pa) pressure shall be not less than that required to advance the track drill up a grade
22、of not less than 20 percent for 100 yards (91 metre (m), and over level ground at a speed of not less than 1.3 miles per hour (2 kilometre per hour (kmh). These requirements are when towing the air compressor unit weighing not less than 8,500 pounds (lb) (3 856 kilogram (kg). The air motors shall ha
23、ve means for being disengaged from the crawler driven train without the use of tools to permit the track drill to be easily towed. 3.4.4.3 Brakes. Each track shall be provided with brakes or track locks to prevent movement of the track drill when on a 50 percent longitudinal slope. Track locks or br
24、akes shall be operable when power is lost. 3.4.4.4 Platform. When specified (see 7.2), a platform shall be fiimished for use by the track drill operator while manipulating the tramming controls during road travel. 3.4.4.5 Toolbox. A lockable metallic toolbox shall be provided to carry those tools an
25、d accessories required to operate the unit. The toolbox shall be securely fastened to the chassis in a protected and accessible location. 3.4.4.6 Pintle. A pintle assembly shall be attached to the chassis to receive the tongue of a 600 or 750 cubic feet per minute (cfm) (0.3 or 0.4 cubic metre per s
26、econd (m3/s) air compressor. 3.4.5 Boom. The boom shall be hydraulically raised, lowered, and swung. Vertical movements of the boom shall be such that holes may be drilled anywhere within the range of from 2.50 to 8 feet (0.8 to 2.4 m) above the ground surface of the tracks. Movement of the boom sha
27、ll be such that holes may be drilled on a line not less than 12 inches (305 mm) outside of either track without repositioning the crawler. The pneumatic drifter drill of the track drill shall be capable of drilling regardless of the position of the boom and mast. Boom movement shall be so controlled
28、 that the boom can be stopped and fixed without creepage at all points in its range of vertical travel. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-59244 3.4.6 Mast. A mounting plate shall b m 9018054 0000b32 673 m A-A-59244 used to secure
29、 th fabricated steel mast to the boom. The mounting plate shall be hydraulically-operated and shall be capable of sliding on the mast for a distance of not less than 3 feet (0.9 m). A reversible air motor or hydraulic cylinder(s), secured to the mast, shall be used to drive the feed mechanism. The m
30、ast assembly shall include an adjustable feed chain, upper and lower feed chain idler sprockets, a pneumatic drifter drill mounting plate, a foot pad, and a drill steel centralizer. Feed chain and idler sprockets shall be arranged so that total travel of the pneumatic drifter drill shall allow the o
31、perator to change 12-foot (3.7 m) sectional drill steel and couplings, by disengagement of the centralizer only. When operating at an air pressure of 90 psi (621 Ha), the air motor or hydraulic cylinder) shall drive the feed chain, and shall provide an effort of not less than 3,000 Ib (1 361 kg) for
32、 crowding and retracting the pneumatic drifter drill. The mast assembly shall be capable of a hydraulic roll operation through an arc of not less than 70 degrees from right to left. The vertical mast dump from a horizontal position shall have a travel of not less than 145 degrees with not more than
33、one mechanical pin change. The mast movement shall be controlled so that the mast can be stopped and fixed without creepage at all points in its range of travel. 3.4.7 Pneumatic drifter drill. The pneumatic drifter drill shall operate on a rated air pressure of 90 psi (621 a), and shall be automatic
34、ally valved to provide not less than 1,500 blows per minute to the chucked drill shank. The pneumatic drifter drill for the type I track drill shall weigh not less than 160 Ib (73 kg) and shall be of the long stroke hammer type. The pneumatic drifter drill for the type II track drill shall weigh not
35、 less than 280 Ib (127 kg) and shall be of the high speed, short stroke type with independent rotation. The chuck shall be designed to prevent the shank from leaving the pneumatic drifter drill, and shall contain parts of high wearing quality. The chuck shall accommodate a four spline drill shank wi
36、th rope thread. Unless otherwise specified (see 7.2), the pneumatic drifter drill shall be furnished with five drill shanks. The pneumatic drifter drill shall also provide for control of clockwise, neutrai, and counterclockwise rotation of the drill rod. The pneumatic drifter drill for the type II t
37、rack drill shall also provide drill rod rotation independent of hammer control. The pneumatic drifter drill shall be designed for wet or dry drilling, and to allow water or air to pass through the unit and the attached drill rod for flushing or blowing purposes. A lubricator shall be provided in the
38、 air line and have an oil reservoir of sufficient capacity for not less than 8 hours of operation. The reservoir shall be equipped with a filler opening with a removable strainer. The cap or reservoir immediately adjacent to the filler cap shall be plainly marked to indicate “Rock Drill Oil.” The lu
39、bricator shall give thorough and positive lubrication to the pneumatic drifter drill and feed motor at all times regardless of the position of the pneumatic drifter drill. 3.4.8 Hydraulic system. The hydraulic system shall be protected against the entrance of dirt or other foreign materials. The hyd
40、raulic system shall be complete with all operating accessories, including a pump, which is driven by an air motor. Hydraulic cylinders shall be of the double- acting type having lock-type check valves. Hydraulic valves shall control retracting speed of all hydraulic cylinders, or an internal flow re
41、striction or bypass shall be provided at each end of the cylinders. A wiper shall be provided at each end of the cylinders. A wiper shall be provided on the cylinders, adjacent to the piston rod seal, to prevent dirt and abrasives from damaging the seal or entering the cylinder. 4 Provided by IHSNot
42、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59244 OLB054 0000b33 50T A-A-59244 3.4.9 Controls. All controls shall be clearly marked as to use and function. The crawler, boom, and mast controls shall be grouped for safe operation and ease of operation when posi
43、tioning the crawler, boom, and mast preparatory to drilling. The drilling controls shall be grouped for safe operation and shall be accessible to the operator when drilling at any position. Drilling controls shall operate the functions of the pneumatic drifter drill, including the rotation, feed, an
44、d flushing operations. 3.4.10 Hoses. The quantity of interconnecting hose lines shall be held to a minimum, consistent with complete operation and shall be provided with nonleak connections. Hoses shall be free from pits, blisters, checks, or other defects and shall be of uniform thickness. Hoses sh
45、all be designed for not less than 200 psi (1 379 Da) working pressure and shall pass a 600 psi (4 137 kPa) hydrostatic test pressure. Pneumatic hose shall have an oil-resistant inner tube and scuff-resistant outer cover. Pneumatic hose shall be supported, where practicable, to prevent kinking. One c
46、onnection shall be provided to receive the supply hose line from the compressor and shall be 2 inches (5 1 mm) with 1 1.50 threads per inch National Taper Pipe (thread), external thread. 3.4.1 1 Dust-suppression system. Unless otherwise specified (see 7.2), a dust-suppression system shall be provide
47、d. The dust-suppression system shall be protected against the entrance of dirt or other foreign materials. It shall be complete with all operating accessories, including a suitable steel reservoir, automatic air operated valve that turns on liquid flow when blowing air is turned on, adjustable fine
48、control, a filler-opening cap, and hoses. The steel reservoir shall be of sufficient size to hold the quantity of detergent water solution necessary to ensure 8 hours of operation of the equipment without being refilled. There shall be no leakage of fluid when the system is operated. 3.4.12 Air tran
49、sportability Configuration. When specified (see 7.2), the track drill shall be transportable by aircraft in a roll-on/roll-off configuration in accordance with MIL-STD-1791. The air transportability configuration shall be for air transport by C-5, C-17, C-130, or C-141 aircraft as specified (see 7.2). 3.4.13 Rail impact. When specified (see 7.2), the track drill shall meet the rail impact requirements of MIL-STD-810. 3.5 Lifting and tiedown attachments. When specified (see 7.2),
