Extended Contact Ball Guide Stage
The Extended Contact Ball Bearing Guided Translation Stages are developed based on our original processing technology.
① High Precision ② High Load Capacity ③ High stiffness ④ High Durability ⑤ Low Profile
The four-array contact structure achieves high load capacity and high stiffness (13 times stiffer than the V groove)
As shown in Fig-1, ball guides are machined across the arcs so that they have R groove structure and good contact with a ball allowing stable load capacity against the load in the directions where contact with the ball occurs frequently.
Long life and free of maintenance
Fig-2 shows the pressure distribution of the R groove and the flat surface. As shown in the figure, pressure exerted on the R groove is dispersed and does not reach inside. Thus, metal fatigue and wear are reduced.
The integral (simultaneous) machining achieves high precision
(straightness: 0.7 µm or lower)
As shown in Fig-3, the top and bottom plates are integrally and simultaneously machined using an originally devised machining jig to minimize respective machining errors. That is, to maintain high precision, these plates are machined in virtually the same state as when a ball is inside.
Reduction in the number of parts enables low profiling
Fig-4 shows a comparison of thickness of a crossed roller stage and a ball guide stage.
The integration of the guides into the top and bottom plates allows low profiling of the ball guide stage virtually the same state as when a ball is inside.
Main Extended Contact Ball Guide Manual Stages
TSD Series GOHT Series KSPT Series