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GJA series
NANJING GONGYI
GJAIIF Roll Spline Subdimension Series |
The GJAIIF Roll Spline Subdimension Series realizes torque transmission via balls rolling on the precision-ground shaft surface, ensuring smooth and responsive linear motion. Its compact subdimension structure saves installation space while maintaining strong overload and power transfer capability, adapting to equipment with limited assembly room. Two configurable types are offered: convex spline and concave spline. The convex spline stands out with superior radial load resistance and higher torque capacity, suitable for heavier working conditions. The structural design adopts three rails distributed on the spline shaft excircle, forming six independent load paths together with protrusions on the spline nut for orderly ball circulation. This optimized rolling path reduces local stress concentration, lowers wear rate and extends the overall service life of the component.
With compact size, reliable torque transmission and overload resistance, the GJAIIF Roll Spline Subdimension Series serves as a core linear motion component for a wide range of precision mechanical systems. It is well suited for automated assembly machinery, small robotic manipulators, precision inspection instruments, light and medium-duty material handling equipment, and general servo motion platforms. It can also be adopted in customized automation devices that require compact layout and synchronized linear movement with torque transfer.
The product’s structural design is built on mature rolling spline motion theory. The technical team optimizes the three-rail and six-load-path structure to balance load distribution and rolling smoothness, and distinguishes the performance differences between convex and concave splines to match different load requirements. Each batch undergoes strict inspection including shaft surface precision check, load performance testing and motion stability verification, to guarantee consistent quality in mass production. Customized specifications can be developed according to customers’ special dimensional and load demands.
The GJAIIF Roll Spline Subdimension Series adopts precision grinding for the spline shaft surface to meet high flatness and smoothness requirements for ball rolling. The rails and nut protrusions are precisely machined to form stable six loading paths, ensuring consistent ball circulation performance. Standard convex and concave spline models are produced in standardized workflows. The factory maintains flexible production arrangements to support bulk orders. All finished products go through pre-delivery quality inspection before packaging and shipment to provide stable and qualified motion components for global buyers.
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| Unit: mm | |||||||||||||||||
Code and | Nominal axial dia. d0 | External dia. D | Length of spline nut L1 | Max. | Dia.of | Dia.of center | Thick- | Depth of | Oil | Dia.of | Dia.of | Position | Standard rated | ||||
Dynamic Stationary Dynamic Static | |||||||||||||||||
GJAIIZ15 | 15 | 230 | 400 | 400 | 3.5H8 | 2 | 0 | 20 | 2 | 27.8 | 65.2 | 3.9 | 8.1 | 27.8 | 65.2 | 3.9 | 8.1 |
GJAIIZ20 | 20 | 300 | 500 | 600 | 4H8 | 2.5 | +0.10 | 26 | 3 | 62.3 | 135.2 | 6.6 | 12.7 | 62.3 | 135.2 | 6.6 | 12.7 |
GJAIIZ25 | 25 | 380 -0.016 | 600 | 800 | 5H8 | 3 | +0.20 | 36 | 3 | 127.3 | 268.3 | 10.9 | 20.2 | 127.3 | 268.3 | 10.9 | 20.2 |
GJAIIZ30 | 30 | 450 | 700 | 1400 | 6H8 | 3 | +0.20 | 40 | 3 | 155.7 | 318.7 | 11.1 | 20 | 155.7 | 318.7 | 11.1 | 20 |
GJAIIZ32 | 32 | 480 -0.016 | 700 | 1400 | 8H8 | 4 | +0.20 | 40 | 3 | 236.4 | 459.9 | 15.8 | 27.1 | 236.4 | 459.9 | 15.8 | 27.1 |
GJAIIZ40 | 40 | 600 -0.019 | 900 | 1500 | 10H8 | 5 | +0.20 | 56 | 4 | 548 | 1081.9 | 29.3 | 50.9 | 548.0 | 1081.9 | 29.3 | 50.9 |
GJA IIZ50 | 50 | 750 -0.019 | 1000 | 2250 | 14H8 | 5.5 | +0.20 | 60 | 4 | 880.6 | 1711.6 | 37.7 | 64.5 | 880.6 | 1711.6 | 37.7 | 64.5 |
GJAIZ70 | 70 | 1000 | 1100 | 2750 | 18H8 | 6 | +0.20 | 68 | 4 | 2488 | 4141.1 | 76.1 | 111.5 | 2135.9 | 4172.9 | 76.2 | 131.1 |
GJAIZ85 | 85 | 0 | 1400 -0.3 | 2750 | 20H8 | 7 | +0.20 | 80 | 5 | 3978 | 6927.4 | 100.2 | 153.6 | 3153.4 | 5797.6 | 96.5 | 156.1 |
GJA IIZ100 | 100 | 1200 | 1600 | 2750 | 28H8 | 9 | +0.20 | 93 | 5 | 6905.9 | 11737.2 | 147.9 | 221.3 | 4437.2 | 8082.0 | 111.8 | 179.2 |
GJAIIF100 | 100 | 1350 | 1600 | 1900 | 195 | 0 | 162 | 25 | 17.5 | 5 | 26 | 18 | 55 | 6905.9 | 11737.2 | 147.9 | 221.3 |