1.b Norton SOHC Bearings

Norton SOHC Bearings : Information on the bearings covered in this Section 

Click on this item to give further detailed information about the specialist imperial bearings listed in this section.  Note: I spend considerable time searching for correct spec British bearings, most now obsolete.  Prices reflect this rarity

- This is the very important twin row, self centering bearing that was originally fitted in both top and bottom bevel housings in all International and early Manx engines. Now obsolete and unobtainable - March 2020:  See detail listing for availability

- Single row (fixed race - not swivelling) RHP bearing, that can be used as an alternative to the original type twin row type (Item no 0005) on the top bevel housing only.  See detail description for this item and description for item 0005 before purchasing

- Single row ball bearing - Fitted to the outer of the two driveside mainshaft bearings in the crankcase on all SOHC engines, both International and early Manx.  This is the correct C3 (loose tolerence) type, from top quality manufacturer RHP - *** 8/3/19: See Note In Detailed Description

- Single row lipped roller bearing. Fitted to the inner of the two driveside mainshaft bearings in the crankcase on all SOHC engines, both International and early Manx.

 

- Single row lipped roller bearing. of the same overall specification and fit (i.e. C3) as original - but high quality RHP/non-lipped type.  Original fitment  was 'lipped' variety - see detail description.  Can be alternative fitted to the inner of the two driveside mainshaft bearings in the crankcase on all SOHC engines, both International and early Manx.

 

- Single row lipped roller bearing in C3 size from RHP. Fitted to all SOHC engines, both International and early Manx, from top quality manufacturer RHP. Very limited quantiities

- Single row ball bearing. Fitted to timing side Model 30/40 (International) SOHC engines, in correct RHP C3 (loose tolerence) type, from top quality manufacturer. Now becoming a very difficult bearing to source

Twin row caged ball bearing. Fitted to Model 30M/40M (Manx) SOHC engines in original C3 looser fit, from good quality SNR manufacturer.  Update October 2019: Only  limited stock available, see detail listing

Twin row caged ball bearing. Fitted to Model 30M/40M (Manx) SOHC engines in original C3 looser fit, from high quality NSK manufacturer.  Update October 2019: Sorry, now sold out and unobtainable from this supplier

- Countersunk screw used to retain securing plates for both main bearings in the crankcases and front camshaft bearings. These are the screws that are soldered over their heads once fitted, to ensure they dont work loose. Rather than trying to clean up th

- Countersunk screw used to retain securing plates for both main bearings in the crankcases and front camshaft bearings. These are the screws that are soldered over their heads once fitted, to ensure they dont work loose. Rather than trying to clean up th

- This is the plate that stops the camshaft bearing from rotating and coming adrift in the main cambox casting

- Single row ball bearing. Fitted to all SOHC engines, both International and early Manx. 

- Single row caged roller bearing. Fitted to Model 30/40 (International) SOHC engines. These are either RHP or Hoffman (Hoffman became RHP) - both best quality and in correct and very difficult to find C3 fit. 

 

Cambox Bearing - Camshaft Back Roller Bearing : as fitted to the Model 30M/40M (Manx) cambox backplate - identifiable from the standard International type, in that the Manx backplate is in magnesium. These are correct RHP versions in correct C3 fit - now very rare

Manufactured by a well established and specialist British bearing supplier who have been making these Bigends for many years - this Bigend is of the same design and specification as the original 1930's - late 1950's OHV and SV design - this being a twin row, crowded roller design (i.e. the rollers do not sit in a cage). Comes complete with Bigend nuts

Manufactured by a well established and specialist British bearing supplier who have been making these Bigends for many years - this particular Bigend is of modified 'Caged Roller' design - more suited to high performance than the original Crowded Roller type.  Comes complete with BigEnd nuts.

Mainshaft Shims to fit OHV and SV Engines (i.e. 16H/Big 4/Mod 18/ES2/Mod 19 etc. Set of 6 shims - 2 each of the following 3 sizes: 0.030”/0.018”/0.012".  See detail listing for fitting details

- Large shielded single row ball bearing. This is the main bearing fitted to all upright and laydown Norton gearbox's from the 1930's - 1950's gearbox's. 

- Single row ball bearing. Fitted to all upright gearbox's mainshafts and Manx model layshafts on the right hand side

Single Ball Bearing to fit all Norton upgright gearbox's - single row ball bearing

Set of 13 rollers to fit all Norton pre-Amc mainshaft sleevegears (+1 spare)

- Single row ball bearing to fit BTH KD1 competition magnetos (as fitted to Norton camshaft engines). I believe this bearing also fits other similar BTH single cylinder magneto's, i.e. standard KD1 and MH1 models

3 screw mainshaft bearing securing plate, to fit all Model 30 and Model 40 International (and CS1/CJ) engines. This pressed steel plate was used to retain the main bearings and ensure they did not 'walk' under heavy use. The plate was secured by 3 screws (sold seperately), which were soldered to the plate after tightening, to ensure they do not come lose. This plate is copied from an original item. Note: this plate fits all International crankcases after approximately 1932. before that time a shallower plate was used. If you are not sure - measure the lip of the main bearing housing ( see second photo), if it sits approx. 0.225" above the crankcase wall it is for this plate. If it measures approximately 0.175" above crankcase - then the very early securing plate is required (see Item no 0287). The late type crankcase is on the left in the 3rd photo

4 screw mainshaft bearing securing plate, to fit all Model 30M and Model 40M magnesium engines. This pressed steel plate was used to retain the main bearings and ensure they did not 'walk' under heavy use. The plate was secured by 4 screws (sold seperately), which were soldered to the plate after tightening, to ensure they do not come lose. This plate is copied from an original item

Single row ball bearing used on all Single Cylinder models (pre-full width hubs) on the plain hub side front hub and also on the brake side for pre-featherbed conical (SOHC Manx) front brakes. They are also used on all rigid\plunger\non-conical rear hubs on the non brake drum side. As always, this bearing is a high quality named brand bearing (i.e. not a chinese bearing!)

Twin row ball bearing used on all Single Cylinder models (pre-full width hubs) on the brake hub side of single sided front hubs (although strangely not used on SOHC conical front hubs. They are also used on all rigid\plunger hubs on the brake drum side. As always, this bearing is a high quality named brand bearing - NSK (i.e. not a chinese bearing!). This twin row bearing was always much more expensive than the single row fitted to the other side, and is now getting quite difficult to find - but as at the end of 2012 I have managed to get another batch!

- Single row ball bearing.from top quality RHP brand. As fitted to magnesium conical rear hubs on 1950 Gardengate and later DOHC Featherbed Manx Nortons.  Special order - see detail listing

 

 

- Single row roller bearing.from top quality RHP brand. As fitted to magnesium conical rear hubs on 1950 Gardengate and later DOHC Featherbed Manx Nortons.  Special order - see detail listing