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Roller Ball Bearings

7mmRollerBallBearing

9mmRollerBallBearing

10mmRollerBallBearing

11mmRollerBallBearing

13mmRollerBallBearing

13mmRollerBallBearingII

No. 94140 (Large dia.)
94141 (Mid dia.)
49596 (13mm clear seal 2pcs)
49597 (9mm 2pcs limited)
15180 (13mm 2pcs)
15181 (9mm 2pcs)
94298 (7mm 2pcs wt. rear stay)
94360 (9.5mm flange)
94361 (12.5mm flange)
94311 (9mm 4pcs)
15308 (RC 11mm 2pcs)
15344 (DR 9mm 2pcs)
15345 (DR 11mm 2pcs)
94609 (7mm 2pcs)
94617 (10mm 2pcs)
94713 (13mm 6pcs)
15475 (13mm Ver.II 2pcs)
95311 (13mm Ver.II 6pcs)
Release Date 1994 (Mid/Large dia.)
1995 (9mm 2pcs limited/13mm clear seal 2pcs)
September 10, 1996 (9mm 2pcs/13mm 2pcs)
1997 (7mm 2pcs wt. rear stay)
1998 (9.5mm flange/12.5mm flange/9mm 4pcs)
October 30, 2002 (RC 11mm 2pcs)
December 4, 2004 (DR 9mm 2pcs/DR 11mm 2pcs)
September 29, 2007 (7mm 2pcs/10mm 2pcs)
November 25, 2009 (13mm 6pcs)
May 31, 2014 (13mm Ver.II 2pcs)
February 11, 2017 (13mm Ver.II 6pcs)
Parts type Rollers
Roller
Type Bearing
Roller Diameter(s) 7 / 9 / 10 / 12.5 / 13mm
Material(s) Steel (Bearing)
Aluminum (Bushing)
The Roller Ball Bearings (Japanese: ローラー用ボールベアリングセット, Rōrā-yō Bōru Bearingu Setto) is a series of Mini 4WD Grade-up Parts released by Tamiya since 1994.

General info Edit

The roller ball bearings, as its name implies, are the ball bearings that can be used as the rollers for a Mini 4WD car. The roller ball bearings were usually holds via being sandwiched by the aluminum bushings. The rollers are available in 7mm to 13mm diameters.

Most roller ball bearings has flat touching surface, meaning it has less friction. All roller bearings were made of steel. Although the flange-type roller ball bearings provides higher friction and are lighter than others due to its design, they are very fragile and their sharp ends are tends to bends.

Some revisions of the original 13mm roller ball bearings has the clear seals, while other revisions has the black or blue seals.

The limited 7mm sets comes with the carbon-mixed nylon one-hardpoint rear roller stay, while the limited 4 pieces 9mm sets comes with the long screws and aluminum spacers for double-roller setups.

External links Edit

Tamiya Japan Edit

Tamiya America Edit

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