Tomei - MAIN BEARING CENTER GRADE A/B/C/D RB26DETT/RB25DE(T)

When tuning engines for higher power output and high RPM the bearings are subjected to extreme load conditions. These harsh conditions require the bearings to be able to cope with excessive loads and stress conditions. The TOMEI Competition Bearing series are designed for fatigue resistance, durability, effective lubrication and resistance to scoring. Designed for use on engines that will be outputting 1,000 HP and at over 10,000RPM. These advanced designed bearings are suitable for the serious professionals in mind whom need results. We also have 3 grades available on all engine applications.
 

APPLICATION		PART		GRADE	SIZE	INDEICATION COLOR	STD GRADE	P/N	QTY per car
ENGINE	MODEL
MAIN CENTER	Upper/ Lower Set	RB26DETT RB25DE(T)	R32 R33 R34	A	1.818～1.821	Black	0	126104	1set
				B	1.821～1.824	Green	1	126105
				C	1.824～1.827	Yellow	2	126106
				D	1.827～1.830	Red	3	126107

■ These products are designed and produced in cooperation with Australia’s ACL Bearing Company, which supplies engine bearings and various engine components as OEM to various automotive manufacturers.
 

The reason why TOMEI Competition Bearing Series do not have the final tin flash plating.

General standard grade bearings will have a Tin flash plating over the entire bearing to give them the grey silver finish. Since these bearings are designed for high end race purposes, the use of the final tin flash is not required as it gives no added benefit. Therefore, these bearings may show different colouring, which is normal.

The disadvantages of using the Tin Flash Plating are 1. Heat dissapation will be reduced. 2. The tin on the bearing back can act as a lubricant at high temperatures, and reduce the friction between the bearing and its housing. 3. At high loads and temperatures the tin plating on the bearing back can break down and “pool” to create hot spots.

To ensure the optimum bearing performance, the TOMEI Competition Bearing Series has not adopted this type of final tin flash plating. Thus the appearance of uneven colouring on our bearings. This poses no issues with performance and bearing efficiency so please do not be alarmed by it. There is a protective oil coating administered during packaging for protection against the elements. Please remove this oil coating prior to use. The protective oil coating will allow the bearings to have a storage shelf life of up to 3 years.