Question

(Q6) Figure (3) shows a countershaft with helical gear (B), bevelg (D), and two supporting (Dthe helical parte n ear \、Q oads acting on the bevel gear are known Forces on the have a ra be determined. Shaft dimensions are known. All shoulder fillets na bearing A takes thrust. The shat rotates at 1000 rpm and is ma iaportant surfaces are finished by grinding. Select suitable radial ball bearings at A and for a dius of 5 mm. Only hardened steel. Ail designed life of 30000hr and 90%reliability . Use application fact orofis, com arks) ー30". Fons act al 500 ma da 5.33 t 120 4a 1RN 37% mm da. Fig.(3) al Fig.(1) Forces act at 500mm ฉั 50 1.37 AN 5.33 N , 120 a 80 dia 1.37AN RAv Forces act at 375-mm dia Fig.(3)

Answer 1

docta Given X-2 Via 5.33 KN X4 .3KN F=0.24 Pnalyein He tica a fercen, - torgue at the the tor MA0, There for e eawal munt 5.33 (1875)mr 4 KN . 26 data the irem fam 0.36 4 l.4+ kn. O.36 A

Venttia plane - 13 400 450 550 3 4.0 Av Cv Honzon plane ら33 3 Au CH forcen Vestice! 4(550) + ト3+C18 4-5) +(~1.34(14)) Cdwlara KN 0.54 - ト3チ Av- 4 .54 (doun ward) ち33 EMAO Ct= Cupuard) CH AH .4 + 6.92 5.33 (down ward 3.06 KN

There fore Hadia) A Load at Avt A Kn raaia dt c Load CAY that nou Llo npo0o pr RD \800 Co-o -RD) mot b2 1483 8-10 4.439 bal a 3 A- -FoY KN FA I 1-019) 02 t 4.439 t9.96 KN

Decp ieove 02Senies A YOu Fov ) 40 m OD - ea Bore 11 adral ball 53 knl, e10 8 3. 2 bear Fo (09) 4.439 KW C1o 99.9 Dep 02 sng le Tor beari C , 95 Bore bal nadia) Moove KN, 69.S Co lo& KN