Complete ball-differential set uses new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Features heat-treated and hardcoated aluminum output shafts, screw for external adjustment, tough composite 34T diff pulley with Labyrinth Dust Covers™, high-performance ball-bearings, high-quality carbide axial thrustbearing, heavy-duty diff washers, and carbide diff balls. Factory pre-assembled. 

XRAY is proud to present the smoothest, highest-quality differential in the RC industry! Manufactured exclusively for XRAY by HUDY, made from world-renowned top-secret Hudy Spring Steel, this high-performance differential set features an exclusive double slotted design, carbide diff balls, new axial ball-bearing with larger balls for smoother operation and ultra-high durability. Impossible to wear out!  

Complete ball-differential set features hardcoated duraluminum output shafts, screw for external adjustment, both diff pulleys (2.125 and 1.77) with Labyrinth Dust Covers™, high-performance ball-bearings, carbide axial thrustbearing, heavy-duty diff washers, and carbide diff balls. 

Long output shaft for #305000 Alu Ball Differential made from new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Heat-treated and hardcoated. 

Short output shaft for #305000 Alu Ball Differential made from new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Heat-treated and hardcoated. 

Special screw for external diff adjustment. Manufactured exclusively by HUDY from world-renowned top-secret "Hudy Spring Steel". 

Precise nylon pulley (34T) and Labyrinth Dust Covers for ball-differential.

The pulley features XRAY invented and patented "Labyrinth Dust Covers", special anti-dust protective covers that are great for keeping dust and dirt out of the diff. Each pulley uses 12 diff balls. 

Precision molded composite "low ratio" ball diff pulley (32T) and Labyrinth Dust Covers. The teeth number (32) is embossed into the side of the pulley for easy identification.  

Rebuild set for one XRAY differential includes two machined diff washers and 12 steel diff balls. 

Two diff washers for ball-differentials. Each side of the washer has a distinct finish; a polished side against which the diff balls ride, and a rougher machined side that contacts the duraluminum diff output. Specially hardened to assure maximum life.  

Steel balls for ball differential. Two complete sets of 12 balls. 

To improve the action of the differential and speed up the break-in process, these carbide balls are the perfect solution. These carbide balls are much harder than the diff washers (over 15HRc more hardened) to ensure the surface of the diff ball will always stay round. Complete set of 12 balls. 

New high-performance option set of low ratio pulleys. The set includes 32T front and rear differential pulleys and Labyrinth Dust Covers (TM), 32T pulley for front one-way, and 18T central layshaft pulleys.  

High-quality ball-bearings 5x8x2.5 (set of 2). 

High-quality axial thrustbearing 3x8x3.5  

High-precision axial thrustbearing for differential features Tungsten Carbide balls. Highest-quality material and design guarantees the smoothest differential operation and increased life. 

Cone washer for ball differentials. Set of 10 pieces. 

CH-clip 8. Set of 10 pieces. 

Super differential silicone lube in a resealable syringe. This is the best Ball Differential lubricant combined with the easiest applicator on the market. 

Steel balls 2.4mm for ball differential. Set of 24 pieces is enough for two ball differentials (12 each). 

High-quality axial thrustbearing 3x8x3.5mm for ball differential. 

Carbide balls 2.4mm for ball differential. Improved, smoother diff operation over standard steel diff balls.  

High-precision axial thrustbearing 3x8x3.5mm for ball differential features Tungsten Carbide balls.  

High-quality ball-bearings ID x OD x thickness (mm) = 5x8x2.5mm. Set of 2 pieces. 

Cone washer ID x OD x thickness = 3mm x 8mm x 0.5mm. Set of 10 pieces.  

8mm CH-clip. To ensure smoother, more precise operation of the XB2 and XB4 differential, the CH clips used inside the differential are manually ground. Set of 2.