Tamiya Bearing - General ball bearing information

Tamiya Bearings

 

General Tamiya ball bearing information
Information by  http://www.hobbyhot.com/Bearing-Set-for-TAMIYA-Model/
General	Tamiya ball bearing are a popular hop up for those running their RC cars. Tamiya has a way of naming their bearings that is not quite according to industry standard, hence this section.
Bearing material	Ball bearings for RC must be of some kind of Stainless Steel. "Chrome Steel" has the lowest corrosion resistance. "Martensitic Stainless Steel" is a medium choice. "Austenitic Stainless Steel" has the best corrosion resistance.
Retainers	Are the things inside the bearing keeping the balls in place. Different types and material is used.
Closures (shields)	These are important for RC use. The Closure is the shield at both ends of the bearing, protecting the balls inside from dirt, moisture and even impact. Metal shields (named "ZZ") Are shields of metal that does not have contact with the inner ring. Positive for RC is the low friction (none), but metal shields will not seal completely so small particles may enter the bearing. Recommended for on road cars. Contact Shields (named "2RS" , "2" for both sides) May be in a variety of plastic/rubber materials ,usually Nitrile Rubber, but will close the bearing completely, and thus protecting the bearing from moisture. Recommended for off-road bashing. Non Contact Shields (named "2RU", "2" for both sides) Also made of various plastics/rubbers, usually Nitrile Rubber, but does not make contact with the inner ring. Nevertheless it has better protection than the metal sheilds, but not the friction that the Contact Sheilds have Recommended for off-road racing where bearing wear is accepted.

Tamiya Description	Outer Diameter (OD/mm)	Bore (ID/mm)	Width (mm)	Section view
620	6	2	2,5
730	7	3	3
830	8	3	3
840	8	4	3
850	8	5	2,5
1150	11	5	4
1160	11	6	4
1260	12	6	4
1280	12	8	3,5
1510	15	10	4
1680	16	8	5
2617	26	17,5	5

How To: Replace Your Tamiya F104X1 Bearings with Boca Bearings

The F104X1 is Tamiya’s latest and greatest super F1. There has been a few design updates from the F104 Pro that allow you to really dial it in to any track surface. While it does ride on a quality set of shielded ball bearings, installing a high-end set of Boca Bearings will really enhance the performance of the car. There is not only a noticeable increase on the track but is also a very easy install.

For this install we will be using Boca’s Ceramic Lightning Ultra Seal Bearing set, part #55-590C YU. At a retail cost of around $55 that’s not a bad investment for a little extra speed.

You can buy more Tamiya bearing set for Tamiya at hobbyhot.com
http://www.hobbyhot.com/Bearing-Set-for-TAMIYA-Model/

ITEMS NEEDED:

 Standard tools used to maintain your car.

Boca Bearings for the Tamiya F104X1

 STEP 1:

Remove the Tamiya bearings from the plastic pouch. Boca has placed all the bearings into separate bags to make it easier to work with.

Replace the front tire bearings

 STEP 2:

Remove the front tires from the F104X1 and pop the bearings out. They should come out quite easily. Find the bag labeled SMR105C-YUU NB2. These are the replacement bearings for the front wheels. Press them into place and re-install the front wheels. NOTE: There is a small axle spacer that should still be on the axle. If it’s not, check the bearings you removed. Sometimes the spacer will stick to the back of the inner bearing. Make sure you use this…it’s important.

Replace the rear axle bearings

 STEP 3:

Remove the rear axle, pop out the axle height spacers and remove the bearings. Find the bag labeled SMR106C-YUU NB2. There are the replacement rear axle bearings. Press them into the axle height spacers and press that assembly back into the rear pod. Reassemble the entire left side of the axle. There should be an axle spacer that goes between the rear pod and the counterweight. If you don’t see it, check to make sure that it’s not stuck to the bearings you removed.

Replace the differential bearings

 STEP 4:

Disassemble the differential. Replace the thrust bearing with the one in the bag labeled SMR115C-YUU NB2. Replace the inner diff bearing with the one in the bag labeled SMR128C-YUU NB2. You will only be using one of the diff bearings on the F104X1. Reassemble the differential.

The F104X1 includes a bearing supported counterweight on the left side of the rear axle. Because this is a limited edition car there is not a complete matching Boca Bearing kit. You can, however, replace these bearings with a set of the Boca SMR115C-YUU NB2 Thrust Bearings.

Once installed, you may not see a dramatic increase on the bench…yet. The first run should fling a bunch of the grease out of the bearings allowing them to spin for quite a long time. Being a high quality set of bearings, they won’t need much maintenance however, for maximum performance, remove and clean them every couple of races (more often if you race outside on a dusty surface).