Concave Linear Motion Spline

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GJZG Concave Linear Motion Spline

The GJZG concave linear motion spline has the advantages of long service life and high rigidity, as the spline nut is made of HRC58 quenched alloy steel or carburized and quenched alloy structural steel, and the spline shaft is made of HRC58 quenched alloy steel. It has a compact structure and is easy to assemble.

As the GJZG concave linear motion spline can achieve zero clearance, balls are capable of transmitting the toque generated from the spline nut or the spline shaft evenly and smoothly. Should the spline shaft be pulled out of the nut, the ball will stay in its place, due to the use of retainers. The concave linear motion spline can work in high speed motion and rotation, for zero clearance or interference fit in rotational direction is achievable. The concave linear motion spline uses precisely ground R-shaped groove whose diameter is almost equal to the ball diameter. This design makes larger contact area of ball the possible and brings higher load bearing capacity.

The concave linear motion spline has a round cross section. It can be designed with a journal diameter larger than that of the convex spline. While the spline shaft and the spline nut make a linear motion, the balls roll and circulate in the raceway and the ball return path.

Technical Specifications of the GJZG Concave Linear Motion Spline (Unit: mm)
Model Shaft Outer Diameter d 0 (h7) Nut Outer Diameter D (h6) Nut Length L 1 Max. Shaft Length L Groove Width b Groove Depth t Groove Length l Lubrication Hole
Diameter d
Basic Torque Rating
Dynamic Torque C T (Nm) Static Torque COT (Nm)
GJZG16 0 16 -0.018 -0.018 0 31 -0.016 0 50 -0.2 400 3.5HB +0.10 2 0 17.5 2 32 30
GJZG20 0 20 -0.021 0 35 -0.016 0 63 -0.2 500 4HB +0.1 2.5 0 29 2 55 55
GJZG25 0 25 -0.021 0 42 -0.016 0 71 -0.3 700 4HB +0.1 2.5 0 36 3 103 105
GJZG30 0 30 -0.021 0 48 -0.016 0 80 -0.30 1000 4HB +0.1 2.5 0 40 3 148 171
GJZG40 0 40 -0.025 0 64 -0.019 0 100 -0.3 1000 6HB +0.1 3.5 0 52 4 375 415
GJZG50 0 50 -0.025 0 80 -0.019 0 125 -0.3 1400 8HB +0.2 4 0 58 4 760 840
GJZG60 0 60 -0.03 0 90 -0.022 0 140 -0.3 1400 12HB +0.2 5 0 67 5 1040 1220
GJZG80 0 80 -0.03 0 120 -0.022 0 160 -0.4 1400 16HB +0.2 6 0 76 5 1920 2310
GJZG100 0 100 -0.035 0 150 -0.025 0 190 -0.4 1400 20HB +0.2 7 0 110 5 3010 3730
GJZG120 0 120 -0.035 0 180 -0.025 0 220 -0.4 1400 32HB +0.2 11 0 120 6 4100 5200

As a specialized concave linear motion spline manufacturer based in China, YiGong provides a wide variety of products including linear guide, precision ball screw, water jet cutting machine, linear motion bushing, and much more.

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  • GJZD Concave Linear Motion Spline The GJZD concave linear motion spline with end housing structure uses closed and smooth raceway. Compared to the other two types of spline, it has better performance in reversing the motion, and is able to make smoother and more agile linear motion along the spline shaft within a wide speed range.