Document 8w7KM9N57rRoMRxwzzarr4Qy

i f (FAWICK INDUSTRIAL CLUTCH FAWICK MANUFACTURING CO. WAUK ESHA SCO N$ IN January 1931 Bulletin 1001 ?' SCF-EC-0110 FAW 01920 / FAWICK INDUSTRIAL CLUTCH A Distinct Advance In Clutch Construction 1H E Fawick Industrial Clutch is designed for use in industrial units -- Power Shovels, Cranes, Drag-Lines; Road Building Machinery, Road Rollers, Concrete Mixers; Farm Tractors, Combine Harvesters; Power Take Off work of all sorts, and many other similar applications. It has two impor tant features of superiority and difference from other clutches: namely, a lighter counterweight and a micrometer adjustment. > Lighter Counterweight In the first place, the counterweight that balances the pull of ceiitrifugal forces is less than 1/3 as heavy as the shoe, and acts on the shoe through a 3 to 1 leverage. This cutting down of weight is a distinct advantage. In other makes of shoe clutches, the counterbalance has been located op posite the pivot at the heel of the shoe, carried on a rigid extension, and because of the necessary limitation of space, it is often heavier than the shoe and' facing. In the Fawick Clutch, this lighter counterweight performs just as efficiently as a larger and heavier weight and does not add to the / weight of the clutch nor take up any un- ! necessary space. \ Fig. 2 Partial assembly showing one shoe and counter.. ^ balance assembly--also toggle and adjust stud. Micrometer Adjustment! , ... '! The toe of the shoe is connected to the counterbalance assembly by a pressure link In the second place, a micrometer ad!., " (not visible) and it is obvious that the justment is provided in the Fawick Clutch- weight and shoe move in opposite directions to take up the play resulting from wear on due to this hook-up--thereby equalizing the fating. With this adj,us|ihent bachjsfioe the centrifigal forces. is moved out from the4oldtch center simul taneously so that an ipOcurate, adjustment ' of each shoe may!be' maintained at all times. . This featirre/aside- from giving ab solute accuracy of adjustinent, eliminates the possibility-c^ any inexact adjustment by ordinary .|nechahical methods that are necessaply^ practised in ^adjusting other makes of clutches, -f"' 'S ':" ' Compensation for Wear There is a certain amount of inevitable Wear on the clutch facings since they bear directly on the inside bore of the flywheel rim, but in the Fawick Clutch any play that develops can be taken up by its ex clusive feature--the micrometer adjustment shown at "D" in Figure 3. An adjust worm f:. Toggle Action gear "D" meshes with an adjust ring gear "E", which meshes with an eccentric stud Figure.2shows the counterweight pivoted at each inner end of three shoe toggles "F". to tjie^pider at "A", having its bearing on A turn of the adjust worm gear is trans tjie Outside of the boss. Motion is transmit mitted by the adjust gear to each of these ted- to the counterbalance assembly through eccentric studs, and displaces the toggles toggle "B", which is connected to the shift in, or out simultaneously as may be required sleeve by adjust stud "C". to compensate for wear bn the clutch facing. m FAW 01921 FAWICK MANUFACTURING COMPANY and no loose parts such as driving studs, etc. to rattle either when the clutch is in or out. Chatter Eliminated The clutch is made very largely of steel stampings, thus insuring interchangeability of parts, exact machining, perfect balance, and great strength with minimum weight. The clutch shoes are pivoted to the driving spider by means of extra large hollow steel pins, hardened and ground, and. alKparts subject to wear are also of hardened-steel,, thereby eliminating wear and preventing4-, noise or chatter, either when the! clutch isengaged or disengaged. The clutch -spider has a tapered bore and i? secured to the drive shaft by nut and key,-eliminating any possibility of loosenesS.pt, of noise^develop ing between the clutch &nd drive* shaft. Fig. 3 Clutch assembly. .. Note single point adjust screw. Facing Has Lone* Life ' The clutch facing material is moulded Equal Adjustment Positive asbestos co|fi$ound sijnilar to that used on the heaviest- truck dnd bus brakes. Unit Notches are cut on the outside of worm pressures'-are . very ,much lower that those and a detent spring provided to prevent successfully-used in brake service and tins accidental change of adjustment. Moving results in- exceptionally long life with a the adjust worm one notch results in moving | mmimuni- qf) adjustment. the shoe approximately one one-thousandth '***'' ' of an inch. It is, therefore, possible i (Power Take Off obtain extremely accurate adjustment, `apd 4 4There is a complete line of equal adjustment is positively insured for **Poiver Take Offunits available to. each shoe. It is impossible for one shoe' to fit any standard S.A.E.bell hous- < become tighter than the others or to get the ing for industrial power units. clutch out of balance. '*4 "' * Absorbs Heat ' - The Fawick Clutch jjvqrks excellently in units where contipuqps(slipping ^ unavoid able, such as cranes and shpyels,4 because of its unusual heat 'dissipatihg qualities. The heat generated. By slipping is transmitted directly into-the rim ofthe flywheel and the pressed.st^l jsho^/act us a fan, insuring a constant 4circulation of air on the inside of the shoes and over-and around the flywheel. The location' pf the shoe pivot pin -is such that the clearance at both heel and toe of the linings^4 practically the same when the clutch is, disengaged and the lining wears dowh uniformly at both ends as the shoes are adjusted. There is positively no tend ency to drag when the clutch is disengaged Fig. 4 Power fake off assembly. No. 3 housing and I2n dutch. FAWICK INDUSTRIAL CLUTCH Capacity The following tables show the operating range in Torque and H. P. per 100 R. P. M. for various sizes of Fawick Clutches at various loadings, which are within prac tical limits. The ultimate capacity with modem moulded asbestos compound fac ings, as used in the Fawick Clutch, is above 80# per square inch Selecting the proper clutch for any particular service is very I largely a matter of experience. The resources of our Engmeenng All average service, such as in Farm Tractors, Industrial Power Units, or the like, where a proper proportion between size, cost and effective life is desired, a load ing of 7 to 8 pounds has been found to be satisfactory practice. We have shown the Torque and H. P. at 734# hi red in the table below, and these figures may be taken as normal capa city for each of the different size clutches. There are some classes of severe service, however, that may require loadings as low as 5# per square inch, and then again it is quite possible to have satisfactory per formance in intermittent service with load ings up to 10#. f Fig. 5 FrQjx% vt<fw of 1$" cli^tch in No, 3 housing. Department ^with ypars of experience in making!; 'clutch recommendations are at your clisposql'. j * .See data sheets for detailed information , on:-size Ipd Amounting dimensions of each **;dvutch' ahd> pFower take-off. Capacity of Fawick Industrial Clutches Torque, in pound inches- Hoiiepbwer per 100 R.P. M. 10x2% Clutch 12x2% Clutch 14x3% Clutch' 16x3 % Clutch Tan. Load Torque H.P. Torque h.p;" Torque ;; ftp. Torque H.P. 20x5" Clutch Torque H.P. 28x7" Clutch Torque H.P. 5# 5M 6 6H 7 714 8 aH 9 10 < 1800 2.86 2593" I#. 11 .4169 1981 3.14 2852: i ,4.53 4586 2161 3.43 3111 4.94 5003 2341 3.71.. $370 5,35 5420 2521 4.W 3630 ,5.76 5837 2701 4.28 3889" :;6.i7 6254 2881 ,4i 57 4148 ; 6.58 6671 3061; 4.85 4408;: 6.99 7088 32.41 5.15 1.4667 7.40 7505 3421 5*43f `4926 7,82 7922 '3601 ^'.72" 5186 8.22 8339 * 6.61 7.28 7.94 8.60 9,26 9.92 10.58 11.25 11.91 12.57 13.23 5864 6451 7037 7624 8210 8796 9383 9969 10556 11142 11729 9.30 10.23 11.16 12.09 13.02 13.95 14.88 15.81 16.74 17.67 18.60 13090 14399 15708 17017 18326 19635 20944 22253 23562 24871 26180 20.77 22,84 24.92 27.00 29.08 31.16 33.23 35.31 37.39 39.46 41.54 35228 38751 42274 45796 4 931.7 52840 56363 59886 63408 66931 70454 55.88 61.47 67.06 72.64 78.23 83.82 89,41 95.00 100.58 106.17 111.76 The Fawick Industrial Clutch comes in six,Standard sizes, each with capa cities e^ual to any normal duty: "i;0;x 2%--l2 x 2%--14 x 3M ; 16x334--20 x 5 --28 x7 * Special clutches of the same general type may be built to your specifications. In the Fawick Industrial Clutch, you will find a unit that performs its func tions more smoothly and effectively than has heretofore been possible. It is not just another clutch, but due to its practical features marks a distinct advance in efficient clutch construction. FAW 01923