R Series | JTEKT Machinery North America
R Series Machine

R Series

The R Series delivers advanced single and double disc grinding technology engineered to meet the precision, productivity, and surface finish demands of the automotive and information technology industries. Designed to process small to mid-size components with high accuracy, the R Series provides flexibility across a wide range of part types while offering options for automation, dual spindles, and indexing tables to maximize throughput.

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Precision Single and Double Disc Grinding Solutions

The R Series delivers advanced single and double disc grinding solutions engineered for precision, productivity, and efficiency. From compact parts like cages, spacers, and wafers to larger components such as rotors, housings, sprockets, and pump bodies, the R Series offers flexibility to handle a wide range of applications across automotive and information technology industries.

Designed to scale with production demands, the series ranges from single-disc machines like the R031 and R421/422—ideal for small, high-finish parts—to high-capacity systems such as the R431, R631/632, and the RV2, capable of grinding multiple parts simultaneously or handling larger components with full automation.


Models & Specifications

R011R031R421R422
Grinding Capacity: O.D. (Max)in (mm)1.97 (φ50)3.94 (φ100)3.94 (φ100)3.94 (φ100)
Grinding Capacity: T (Max)in (mm)0.118 (3)1.97 (50)1.97 (50)1.97 (50)
Grinding Wheel Size: O.D. (Max)in (mm)1.57 (φ40)12.00 (φ305)7.09 (φ180)7.09 (φ180)
Floor Space: WxDin (mm)23.62 x 51.18 (600 × 1,300)55.11 x 59.05 (1,400 × 1,500)51.18 x 55.11 (1,300 × 1,400)61.42 x 55.11 (1,560 × 1,300)
Machine Weightlb (Kg)1,102 (500)8,600 (3,900)5,513 (2,500)6,615 (3,000)
R431R631R632RV1/RV2
Grinding Capacity: O.D. (Max)in (mm)3.94 (φ100)4.92 (φ125)4.92 (φ125)11.81 (φ300)
Grinding Capacity: T (Max)in (mm)1.97 (50)1.38 (35)1.38 (35)11.81 (300)
Grinding Wheel Size: O.D. (Max)in (mm)12.00 (φ305)12.00 (φ305)12.00 (φ305)17.91 (φ455)
Floor Space: WxDin (mm)55.11 x 59.05 (1,400 × 1,500)59.05 x 88.58 (1,500 × 2,250)59.05 x 88.58 (1,500 × 2,250)86.61 x 102.36 (2,200 × 2,600)
Machine Weightlb (Kg)8,820 (4,000)13,230 (6,000)13,230 (6,000)22,050 (10,000)

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