Shims

[Ray McCrary]

Hi, Does anyone have p/n and application for shims for the kingpins. I am doing the Torrington bearings conversion, and need some .004 and .016 shims to adjust end-float. Best, Ray McCrary "Speed is Life; of course Luck and Altitude are helpful, too."

[CFritz7001@aol.com]

Ray, If you are installing Torrington thrust bearings, you have to use specially-hardened washers (one above and the other below the bearing itself), since these form the "races" on which the roller (needle) bearings ride. These hardened washers come in two thicknesses. The bearing number is Torrington NTA 1220 Thick washer is Torrington TRB 1220 Thin washer is Torrington TRA 1220 Get extras of both thicknesses, since you may have to use some combination of them to get the correct fit. You may find (as I did) that you will have to do a bit of filing on the NON-THRUST surface of the steering knuckle to get enough clearance to install the bearing and its two washers. (Their combined thickness is slightly greater than the thickness of the original bronze thrust washer.) Pack them with the best grease you can find before installing them between the bottom of the axle and the steering knuckle. It's a fiddly sort of job, but worth the effort to do. Regards, Carl Fritz TC # 6756 Gainesville, Florida

[Steve.Fielder@winzerwurth.co.uk]

Good Morning all, I am in the middle of converting the front hubs to taper roller bearings and am having great difficulty in sourcing pre cut shims to take up the tolerance. Does anyone know of a source for these parts, preferably in the UK? Or does anyone supply punches to make your own shims? Obtaining shim stock is not a problem, it`s just cutting the shims. All answers, as ever, gratefully recieved. Steve TC4219 (sans front axle, hubs etc)

[Davidtasa@aol.com]

Steve, The shims used for the front axle of the MGB will work and are readily available from Moss UK. I don't know the parts numbers off hand, but I'm sure you can find them in the catalogue for MGB parts. I believe Roger Furneaux can also supply shims for that application as well. David Tasa TC 3896 Bad Soden, Germany [Non-text portions of this message have been removed]

[ROSS TAYLOR]

.The fitting of taper bearings to TC's front hubs is a definite no/no this is the main cause of front stub axle fatigue and failure, deep groove bearings must be used in the assembly,the idea is to lock up the axle and hub into one rotating body,to explain it simply is difficult but the inner part of the bearings should be locked up solid between the back spacer ,back inner race,centre spacer ,front inner race and front washer.The front washer is thinner on the outer diameter to give clearance on the outer section of the race so as not to cause binding.The fit of the outer diameter of the bearings in the hub is fairly critical as it prevents the bearing rotating within the hub rather than with the hub.Only use taper bearings where there is a large thrust component as deep groove bearings will support a greater dynamic load than taper bearings.45 years Engineering experience has taught me this as well as owning TC's and others for 35 years.By the way Jeff have you fitted that 4.33 crownwheel and pinion to the ex red cigar yet? Rossco P Coaltrain

----- Original Message ----- From: Steve.Fielder@winzerwurth.co.uk Sent: Thursday, 28 November 2002 8:42 PM To: mg-tabc@yahoogroups.com Subject: [mg-tabc] Shims Good Morning all, I am in the middle of converting the front hubs to taper roller bearings and am having great difficulty in sourcing pre cut shims to take up the tolerance. Does anyone know of a source for these parts, preferably in the UK? Or does anyone supply punches to make your own shims? Obtaining shim stock is not a problem, it`s just cutting the shims. All answers, as ever, gratefully received. Steve TC4219 (sans front axle, hubs etc) Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com [Non-text portions of this message have been removed]

[Robert Grunau]

It was NOT the fitting of tapered roller bearings that caused" TC front stub axle fatigue and failure" but the fact that many owners fitted tapered rollers WITHOUT the bearing spacer. Properly installed and shimmed spacer tapered roller bearings work fine for me and many others and IMHO are a superior bearing to standard ball bearings. But you MUST install and shim the spacer to lock up the stub axle assembly and improve the bending strength. Millions of MGBs work fine on shimmed taper bearings. Bob Grunau .The fitting of taper bearings to TC's front hubs is a definite no/no this is the main cause ailof front stub axle fatigue and fure, deep groove bearings must be used in the assembly,the idea is to lock up the axle and hub into one rotating body,to explain it simply is difficult but the inner part of the bearings should be locked up solid between the back spacer ,back inner race,centre spacer ,front inner race and front washer.The front washer is thinner on the outer diameter to give clearance on the outer section of the race so as not to cause binding.The fit of the outer diameter of the bearings in the hub is fairly critical as it prevents the bearing rotating within the hub rather than with the hub.Only use taper bearings where there is a large thrust component as deep groove bearings will support a greater dynamic load than taper bearings.45 years Engineering experience has taught me this as well as owning TC's and others for 35 years.By the way Jeff have you fitted that! 4.33 crownwheel and pinion to the ex red cigar yet? Rossco P Coaltrain Good Morning all, I am in the middle of converting the front hubs to taper roller bearings and am having great difficulty in sourcing pre cut shims to take up the tolerance. Does anyone know of a source for these parts, preferably in the UK? Or does anyone supply punches to make your own shims? Obtaining shim stock is not a problem, it`s just cutting the shims. All answers, as ever, gratefully received. Steve TC4219 (sans front axle, hubs etc) --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.408 / Virus Database: 230 - Release Date: 10/24/02

[Ray]

Bob's right! Tapered bearings work well only if properly shimmed. If not shimmed, they destroy the strength of the double column formed by a properly tightened stack of the inner race, shims,spacer column, and outer race. And groove the hubs and spindles. Poorly shimmed ball bearings will do the same damage. Best, Ray Subject: RE: [mg-tabc] Shims It was NOT the fitting of tapered roller bearings that caused" TC front stub axle fatigue and failure" but the fact that many owners fitted tapered rollers WITHOUT the bearing spacer. Properly installed and shimmed spacer tapered roller bearings work fine for me and many others and IMHO are a superior bearing to standard ball bearings. But you MUST install and shim the spacer to lock up the stub axle assembly and improve the bending strength. Millions of MGBs work fine on shimmed taper bearings. Bob Grunau [Non-text portions of this message have been removed]

[joecurto@aol.com]

Steve an excellent and inexpensive soure for pre cut shims is a machine shop supply these are used to space arbors on milling machines and the like. Joe [Non-text portions of this message have been removed]

[MGTC1946@aol.com]

does anyone have a source for a selection of precut shims for the rear hubs? if not what is the best material to make these from? brass shim stock? if so about what thickness and how best to cut the shims out of this material? will gasket material work? cutting an accurate circle in shim stock with a razorblade without it tearing looks a bit tedious. any suggestions? thanks , charlie [Non-text portions of this message have been removed]

[fnitz]

I think steel is the best idea for shims. Brass is just way too soft. -----Original Message----- From: MGTC1946@aol.com [mailto:MGTC1946@aol.com] Sent: Friday, October 31, 2003 8:42 PM To: mg-tabc@yahoogroups.com Subject: [mg-tabc] shims does anyone have a source for a selection of precut shims for the rear hubs? if not what is the best material to make these from? brass shim stock? if so about what thickness and how best to cut the shims out of this material? will gasket material work? cutting an accurate circle in shim stock with a razorblade without it tearing looks a bit tedious. any suggestions? thanks , charlie [Non-text portions of this message have been removed] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/