AIR FORCE MIL-L-4448-1952 LATHE ENGINE FLOOR MOUNTED SLIDING GAP BED 180 INCHES LONG 50 INCHES OPEN 25 INCHES CLOSED RATED SWING GEARED HEAD DRIVE《车床 发动机 地面安装 滑动差距床180英寸长 50英寸开关 25.pdf

1、1 MIL-L-4i-1LI 3i-1 777770b 0243220 b MILITARY SPECIFICATION LATHE, EI?INE, FLOOR LONTH), SLIDING GAP BED 230 INCHES XNG, 50 IIJCHES OPEN, 25 IJCIIE3 CLCEEU RATED SVING, GUKED iiEAD DRIVE 1. SCOPE AND CLASSIFICATION 1.1 SCO e.- This specification covers a heavy-duty metal cutting geared he with equi

2、pment and accessories as described herein, with or without other equipment at the option of the procuring agency. The lathe is intended for use in machine shops and shall be euitable for rough turning and boring, and fine finish cutting on work requiring accurate dimensions for close fits; and for c

3、utting screw-threads fine and coarse, right or left hand leads. (See 6.2) E . 1.2 Classification.- 1.2.1 -.- The lathe shall be of the geared head, sliding bed gap type only. 1.2.2 Sise.- The lathe shall be of one size only, commercially rated a Z5bO inchameter swing, and as hereinafter specified. 2

4、. APPLICABZE SPECIFICATIONS AND PUBLICATIONS 2.1 S cificationS.- The following specificationa of the issue in effect on + tie date of invitation for bids form a part of this specification. Specifications t Federal CC-IM lotors; Alternating-current, Fractional Horse- CC-h Ball TT-C+95 Colors; (For) R

5、eady-Mixed Paints !IGc40t37 JAN-P-100 JAN-P-lOi+ power, Single Phase and Universal ?dotors; Alternating Current, Integral Horsepower -1t36 Bearings; Roller *. . Kilitary Color Conditioning of kchinery and Shop Equipment (General Specification For) Packaging and Packing for Overseas Shipment (General

6、 Specification For) Packaging and Packing for Overseas Shipment (Crates, Sheathed, Wood, Nailed) M W M CORP. DAYTON, OHIO 5/60 300 Licensed by Information Handling Services- : MIL-L-4448 3Li m 77777Ob 0243223 m Ai r-Foroe Navy Aeronauti aal: ALP-13 Preservation end Packaging Parts and Equipment (Gen

7、eral Speoifioation for) st andards : MIGSTD-129 Marking of Shipments Publio ationa: Air Foroe Navy Aeronautioal Bulletin i43 Speoifioations and Standerds, Use of (Copiei of speoifications end stendards required by oontraotors in oonneotion with speoifio procurement funotions should be obtained from

8、the procuring egenoy or as direoted by the oontraoting offioer.) 2.2 ther publiaetionse- The following publioations, of the issue in effect on date of invitation for bids, unless otherwise atrited, form a part of this speoifioationt National Bureau of Standards Publoation Handbook H28 - Screw-Thread

9、 Standards for Federal Semioes (Copies of Handbook H28 may be obtained upon applioation, acoompanied by money order, ooupon, or oash to the Superintendent of -O2 Chicago Union Station, Chioago 6, Illinois.) NFPA No 70 National Eleotrioal Code (CopLes of WPA No, 70 may e obtained upon application aca

10、om-, Battergmaroh Street, Boston 10, Mabs.) panied by money,-order, ooupon or oash to the National Fire Pt-oteotibn i * Assooiatio reclaimi- of the lathe without authorization of the procuring agency. I- Licensed by Information Handling ServicesMIL-L-4YYB 3Li W 499990b 0243223 II W 3.4.3 Fastening d

11、evices.- AW screws, pins, bolts and similar parts shall be ineralled with an adequate means for preventing loss of proper tight- ness and ad3ustment. All such parts when subject to removal or adjustmat, shall not be swaged, peened, staked, or otherwise permanently deformed, 3.4.4 Electrical connecti

12、ons.- Elec+ TABLE I (Contd) Diameter of lead screw, inchos, minimum Cross slide travel, inches, minumum Xidth of bed, inches, minimum Compound rest trtavel, inches, rpinimum iliameter srna11 faue plate, approximately, inchea 6-3/4 i4 Diameter large face plate, approximately, inche8 45-1/6L Taper att

13、achment, included angle, capacity not less than 182 . Taper attachment length capacity in one setting, inches, 2,!+ minimum Motor, electric, horsepower, minimum Motor rpm, minimum Chuck, 4- jaw, inchea Chuck, 3-jaw, inchea 2s KO0 28 le: 3.6 IIeadstock.- The headstock shall contain the complete multi

14、ple gear train, compound and reverse feed gears to control the selective speed ranges as specified in paragraph 3.6.1 aiid Table I. The headstock casting shall be reinforced and ribbed to insure strength and rigidity. 3.6.1 Spindle speed change levers.- Spindle speed changes shall be obtained,throug

15、h the use of shift levers mounted on the front of the head- stock. he multiple gear train for the spindle drive shall be so arranged that conflicting ratios cannot be engaged at one time, provided with a locating arrangement so that the gears will not move except by positive action of the operator.

16、mate ranger Levers shall be Spindle speed r.p.m. approxl- 5, 6, 8, 10, 11, 13, 15, 17, 19, *25 3a34, 38, 45 50, 57, 66, 76, bg, 100, 112, 134, 150, i -44 firi*n-mM$ nu f nr coiicentraitv andaQmuent, e (See 6.2) 3.17.l Lathe centers,- Two lathe centers shall be furnished with each Centers shall be in

17、 accordance with Table 1 and ASA Standard B5,lO. 12 Licensed by Information Handling ServicesMIL-L-LILILI 3LI W 7777706 02LI3232 2 W m-L-I+!./$ (USAI) 3.3.2 Center sleeve.= The headstock spindle center sleeve shall be in accordance vi%h Table I and ASA Standard B5.10. outside diameters of sleeve sha

18、ll not exceed 0.0002 inch total indicator reading. Eccentdcity between inside and 3.17.3 Face plate, small.- The small face plate shall be in accordance with Table I. have two or more equally spaced driving slots. accordance with Table II. It shall be accurately fitted to the spindle nose and shall

19、The accuracy shall be in 3.17.4 Face plate, large.- The plate shall be of high-strength, gray cast-iron, having a diameter as specified in Table I. It shall be of heavy ribbed back construction, accurately fitted to the lathe spindle nose. plate ahall have a minimum of four equally spaced T-slots, i

20、n accordance with ASA Standard B5.1, and fitted with 4 independent jaws. The (see 3.17) 3.17.5 Tool Ost.- Unless otherwise specified, tool. post shall be alloy steel heat-trea -GdfT. e o the strap and stud type of four or more studs conforming to ASA Standard 35.22. complete-with locking screws and

21、serrated base of sufficient size to provide openings as specified in Table I. (See 6.2) support the bGction when extended to the desired position. Unless otherwise specified, the tool post shall be 3.17.6 Jacks.- Two (2) screw support jacks shall be furnished to properly 3.17.7 Uicrometer carriage s

22、top.- The stop shall be graduated in incre- ment= of 0.001 inch and shall have a total screw travel of not leso than linch. either side of the carriage. It shall be suitable for facing, turning, and boring operations on 3.17.g Wrenches.- If specified, one complete set of wrenches for main- tenance a

23、nd operation shall be furnished with each lathe. (See 6.2) 3.17.9 Taper attachment.- The taper attachment shall be of the tele- scopic screw or universal type and so constmcted that tapers as specified in Table I may be turned in any position on the bed. The taper attachment shall be mounted on the

24、rear of the carriage. in degrees on one end and inches per foot on the other end, with a positive means of locking in the desired setting and shall be so constructed that opposing tapers may be turned. The taper attachment shall be graduated 3.17.10 Chuck, k-jaw, independent.- The chuck body shall b

25、e steel, medium duty, with finished back and fitted to the spindle of the lathe. without re- sorting to the use of adaptors. ing type and, unless otherwise specified, shall be in accordance with Table I. Face of chuck shall be ground true to a straight edge and graduated in inches. Chuck shall have

26、stepped, reversible, independent jaws, and one wrench for operating chuck jaws. Chuck jaws shall be ofalloy steel with ground steps and bite, heat-treated to a satisfactory degree of hardness to resist wear, chipping, or breakage, and accurately fitted to the chuck My. screws for operatingthe chuck

27、jaws shall be threaded their full length with a heavy square thread and accurately fitted into their bearings in the Ahuck body. readingon the periphery of he chuck, face of body and face of jaw steps, shall iiot be more than 0.0002 inch and the bite of the jaw not more than 0.003 inch Chuck shall b

28、e of the individul screw adjust- The adjusting In addition to the -tests prescribed in Table 11, the total indicator Licensed by Information Handling ServicesMIL-LW (USAF) 3J7.11 Chuck, +jaw, scroll,= The chuck body shal be steel, universal It shall have a finished back and shall geared, self-center

29、ing, medium duty. be fitted to the spindle noBe of the lathe without resorting to the use of adaptors, in Table J, Chuck body shall be furnished with sufficient jaws to hold work internally or externally; also one wrench shall be furnished for operating the chuck jaws, factory doflee of hardness to

30、resist wear, chipping, or breakage with ground steps and bite, and accurately fitted to the chuck body, the lathe, the chuck shall meet the requirements specified in 3.17,10, eccentricity of the jam, when tightened on nominal Sze stock, shall not exceed 0,003 inch total indicator reading, Unless oth

31、erwise specified, the chuck shall be of size specified Chuck jaws shall be of alloy steel, heat-treated to a satis- When installed on The (See 6,2) 3,lg Spare parts,- When specified, extra belts shall be furnished with each machine. (See 6.2) 3.19 Yforkmanship,= The lathes and their equipment shall

32、be new and Of the qualtty of workmariship necessary to produce lathes and equipment of good appear.TNG, INSPECTION, Ah3 TEST H1OCEDURELei 4.1 General,- The lathes and all the material entering into the manu- facture thwnay be aubject to inspection by authorized Government inspec- tors, When inspecti

33、on is conducted at the contractors plant, all tests requlred by this specification and/or contract, or purchase order shall be conducted by the contractor under the supervision of an authorized Government inspector, The Government inspector may, at his option, conduct any of all of the tests, The pl

34、ace of inspection and acceptance shall be as specified in the invitation for bids, contract, or purchase order. 4.2 Inspection,- Each lathe shall be given a general inspection for material, workmanship, dimensions, perforarince, painting, marking, packaging, packing, labeling, and general compliance

35、 wish the requirements of this apecificat on , (See 6.2) 4.3 All tests shall be performed and the applicable tolerances adhered 4,3,1 Dielectric test,- nie wiring of the electric system, inckuding t In ammnce with Table TI as applicable, motor and fl ch, shall= hstand a dielectric test of a voltage

36、equal to two times the rated voltage +loo0 volts N!S, for a period of 1 minute between the specified circuit and the lathe bed proper, !Che frequency ofthe teating circuit shall not be %ass fhunthe rated frequency of the apparatue tested, without fur- full, particulars concerning previous rejections

37、, and measures taken to overcome the defects, k,3,2 Retest,- Rejected machines shall not be resubmitted for inspection n v 5, FREPARATION FWt DELIMRY Licensed by Information Handling Servicesin accordance with Specifiction AN-P-13, Method I. bracing shall be in accordance with Specification JAN-P-10

38、0. Cushioning, blocking and (See 6.2) all equipment, and shall-be-of uniform size, designated to inclose the contents in snug tight fitting manner. (See 6.2) 1 5.3.1 Domestic shinmen%.- For domestic shiment. interior containers shall as to insure acceptance by common or other carrier for safe transp

39、ortation at the lowest rate, to the point of delivery. finished machined parts, unless otherwise protected, shall be thoroughly cleaned dried and covered with a meservative coatinpr to assure that the machine will All exposed bearing surfaces and equipment shall be shrouded or otherwise protected to

40、prevent corrosion and to exclude extraneous materials. conform to the requirements of Consolidated Freight Classification RuleS.in effect at the time of shipment. The use of corrugated or solid fiberboard, having a minimum Mullen Test of less than 275 pounds is prohibited, Containers shall be capabl

41、e of withstanding storage, rough handling and reshipment without the necessity or repacking. Except as specified herein, containers shall packed in one nailed wood-sheathed crate conforming to the requirements of Specification JAN-P-lO!+, Type LI, vrith skid base. (See 6.2) - - -, ”.-. Shipments. Ga

42、p bed 180 inches long, 50 inches open, 25 inches closed, head drive, electric notor driven, 25H.P., 220/440 volts, 3 phase, 60 cycle, A.C., (Mfrfs part and/or model No.), Specification llI-L-,!-lj- I e. Current, if different (see 3.a.k). - - Licensed by Information Handling Services- - -_ MIL-L-YY46

43、 3Y a 779970b 0243235 i, 3. kr 1, m. n, O* P. q* r. Name plate requirements, if different (see 3.16) , Stock number requirements (see3,16,1) . Equipment requirements, if different (see 3.17). Tool post, if different (see 3.17.5). Wrenches, if required (see 3.17.g) , Chuck size8, if different (see 3,

44、17.10 and 3.17.11). Spare belts to be furnished, if required (see 3.18). ?lace of inspection and type of inspection (see 4.1 and 4.3). Prsservation, packaging, packing and shipment, if different, and when packing for overseas shipment is required (see 5,2, 5.3, Marking (see 5 ,4) . arid 5*3*2)r 6.2,

45、l Data with bid,- Each bidder shall be requimd to furnish with his bid complete ddscrip6ive data (drawings, specifications, handbook of Instructions, etc,) covering the items he proposes to furnish under this specification and the invitation for bid, Patent Notice:- Tihen Government drawings, specif

46、ications, or other data are used for any turpose other than in connection with a definitely related Goverment procurement operation, the United States Government thereby inuure no responsibility nor any obligation whatsoever; and the fact that the Gov- ernment my have formuated, fiwnished, or in any

47、 way supplied said dravdngs, specifications, or other data, is not to be regarded by implication or other- xise as in any manner licensing the holder, or any other person or corporation, or conveying; any rights or permission to manufacture, use or sell any patented invention that may in any way be

48、related thereto. Licensed by Information Handling ServicesMIL-L-444 34 W 7777906 024323b T MIL-LW (USAF) 5 6 Y 13 $ 1 3 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11 I 12. Motor Housing 13 Headstock 4. Control panel 15. Face plate 17. Bed way 16. Carriage 19 Tool post 20. Compound adjusting handle a. Rapid trav

49、erse 22. Tailstock spindle 23 Tailstock 24. Spindle speed selector levers 16. Tailstock spindle handwheel Tailstock positioning crank Bed supporting jacks Top bed sectfon Carriage handwheel Grosa-slide adjusting handle Apron Lead sorcm Apron pinion rack -bed 89CkOn Quick-change gear box Spindle speed selector levera. 0! Licensed by Information Handling Services3 I Tailstock Way Alignment 4 Spindie Cantar Runout spindle Hose Runout 6 U Cu dotion of Spindle mimm Wng along length of bed .o01 ia 1JI inchas, Total iadicator ruing O fo