Bearings and cages
Posted: Fri Dec 22, 2017 9:01 am
Dear All, Cages tend to be very flimsy. I find it hard to believe that they could maintain even spacing of the balls if the balls were strongly inclined to arrange themselves otherwise. I conclude from this that the balls somehow tend towards even spacing. Does that make sense? Graham On 22 December 2017 3:15:26 p.m. Graham Knight graham.knight5@gmail.com> wrote:
#ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879 -- #ygrps-yiv-623649821yiv0240667879ygrp-mkp { border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp hr { border:1px solid #d8d8d8;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp #ygrps-yiv-623649821yiv0240667879hd { color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp #ygrps-yiv-623649821yiv0240667879ads { margin-bottom:10px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp .ygrps-yiv-623649821yiv0240667879ad { padding:0 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp .ygrps-yiv-623649821yiv0240667879ad p { margin:0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mkp .ygrps-yiv-623649821yiv0240667879ad a { color:#0000ff;text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ygrp-lc { font-family:Arial;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ygrp-lc #ygrps-yiv-623649821yiv0240667879hd { margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ygrp-lc .ygrps-yiv-623649821yiv0240667879ad { margin-bottom:10px;padding:0 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879actions { font-family:Verdana;font-size:11px;padding:10px 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity { background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity span { font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity span:first-child { text-transform:uppercase;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity span a { color:#5085b6;text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity span span { color:#ff7900;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879activity span .ygrps-yiv-623649821yiv0240667879underline { text-decoration:underline;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879attach { clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879attach div a { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879attach img { border:none;padding-right:5px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879attach label { display:block;margin-bottom:5px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879attach label a { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 blockquote { margin:0 0 0 4px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879bold { font-family:Arial;font-size:13px;font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879bold a { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 dd.ygrps-yiv-623649821yiv0240667879last p a { font-family:Verdana;font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 dd.ygrps-yiv-623649821yiv0240667879last p span { margin-right:10px;font-family:Verdana;font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 dd.ygrps-yiv-623649821yiv0240667879last p span.ygrps-yiv-623649821yiv0240667879yshortcuts { margin-right:0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879attach-table div div a { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879attach-table { width:400px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879file-title a, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879file-title a:active, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879file-title a:hover, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879file-title a:visited { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879photo-title a, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879photo-title a:active, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879photo-title a:hover, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div.ygrps-yiv-623649821yiv0240667879photo-title a:visited { text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 div#ygrps-yiv-623649821yiv0240667879ygrp-mlmsg #ygrps-yiv-623649821yiv0240667879ygrp-msg p a span.ygrps-yiv-623649821yiv0240667879yshortcuts { font-family:Verdana;font-size:10px;font-weight:normal;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879green { color:#628c2a;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879MsoNormal { margin:0 0 0 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 o { font-size:0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879photos div { float:left;width:72px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879photos div div { border:1px solid #666666;min-height:62px;overflow:hidden;width:62px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879photos div label { color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879reco-category { font-size:77%;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879reco-desc { font-size:77%;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 .ygrps-yiv-623649821yiv0240667879replbq { margin:4px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-actbar div a:first-child { margin-right:2px;padding-right:5px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg { font-size:13px;font-family:Arial, helvetica, clean, sans-serif;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg table { font-size:inherit;font:100%;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg select, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 input, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 textarea { font:99% Arial, Helvetica, clean, sans-serif;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg pre, #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 code { font:115% monospace;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg * { line-height:1.22em;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-mlmsg #ygrps-yiv-623649821yiv0240667879logo { padding-bottom:10px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-msg p a { font-family:Verdana;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-msg p#ygrps-yiv-623649821yiv0240667879attach-count span { color:#1E66AE;font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-reco #ygrps-yiv-623649821yiv0240667879reco-head { color:#ff7900;font-weight:700;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-reco { margin-bottom:20px;padding:0px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ov li a { font-size:130%;text-decoration:none;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ov li { font-size:77%;list-style-type:square;padding:6px 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-sponsor #ygrps-yiv-623649821yiv0240667879ov ul { margin:0;padding:0 0 0 8px;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-text { font-family:Georgia;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-text p { margin:0 0 1em 0;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-text tt { font-size:120%;} #ygrps-yiv-623649821 #ygrps-yiv-623649821yiv0240667879 #ygrps-yiv-623649821yiv0240667879ygrp-vital ul li:last-child { border-right:none !important;} #ygrps-yiv-623649821Dear All, Thanks for all the advice. I will try some grade 10 1/4 inch. Graham On 22 December 2017 1:09:13 p.m. "Stephen D Stierman morgan7709@sbcglobal.net [mg-tabc]" mg-tabc-noreply@yahoogroups.com> wrote: I can't believe that using loose bearings in a BC box makes one bit of difference in the amount of friction that is imparted, sorry. Quality racing bicycles where friction was an issue were always assembled with loose bearings, particularly in the hubs and crankset.Steve TC2911 [b]From:[/b] "'Mark M' tc8126@earthlink.net [mg-tabc]" mg-tabc-noreply@yahoogroups.com> [b]To:[/b] Yahoogroups mg-tabc@yahoogroups.com> [b]Sent:[/b] Friday, December 22, 2017 6:10 AM [b]Subject:[/b] Re: [mg-tabc] Bearings As a comparison, most motorcycle front forks use loose bearings at the headstock, packed in grease in the frame 'cup' to hold them in position until the mating 'cone' on the fork fits to it. ~Mark TC8126 ----- Original Message ----- [b]From:[/b] i.thomson@talk21.com%20[mg-tabc] [b]To:[/b] mg-tabc@yahoogroups.com [b]Sent:[/b] Friday, December 22, 2017 4:32 AM [b]Subject:[/b] [mg-tabc] Bearings Re: "Yes, as a work around you could use separate balls packed in grease but these can rub on each other and cause resistance. The purpose of the cage is to allow the balls to run independent with minimal friction." You are right Doug. Without a cage the balls will rub as any two will be moving in different directions at the point of contact. It has always struck me though that even with a cage there is a degree of friction present as any particular ball is rubbing against the cage. The difference is that the cage is static so perhaps the friction is half that without the cage. I will leave it to others to do the maths. In this particular case though I doubt if it is significant. Ian Thomson Notts. UK.