日本sankyo三共零间隙定位器RA80-20GT-ZD/X 日本sankyo三共零间隙定位器RA80-20GT-ZD/X The RA Series is a zero-backlash reducer designed for small to medium-size FA applications. It delivers high accuracy, rigidity, and speed. The RA is suitable for equipment that demand motions with a high level of accuracy and speed. Zero Backlash The RollerDrive uses a unique preload mechanism to completely eliminate backlash and deliver output motions that are faithfully true to input commands. Positioning accuracy is particularly good with direction reversing motions. Highest Level of Accuracy in the RollerDrive Series Delivers good positioning accuracy and runout accuracy, which are otherwise difficult qualities to attain with a small reducer. High Rigidity The output shaft is a solid-piece cross roller bearing designed for durability against axial and radial loads. High Speed Max output speed 150 rpm (200 rpm for the RA40) Choice of Motors Dedicated fittings are available for mounting motors from various manufacturers. High Efficiency, Direct Drive Motor couples directly to the input shaft for a direct transfer of power with less transfer loss. Lightweight, Compact Features a compact aluminum-alloy housing for minimal footprint. Rotating arm and crystal pick up in semiconductor manufacturing equipment Precision stage drives for steppers (photolithography) Robot joints Rotary tables for polishing equipment The performance of the RA Series depends on the lubrication system. The unit may have the standard grease lubrication system or the high-speed oil lubrication system. Which system is used depends on the user requirements. To determine whether the lubrication system chosen by Sankyo meets your application, make sure the unit is capable of operating under the conditions that satisfy our life expectancy values. This can be confirmed with the dynamic rated torque graph. The speed and torque must fall within the range highlighted in this graph. Grease Lubrication * Made to order. Model RA40 RA63 RA80 RA100 RA125 Gear Ratio 15 20 20 30* 20 30* 20 30* Max Torque for Starts/Stops N・m 57.7 129.3 202.3 147.9 564.8 250.3 938.6 637.5 Maximum Allowable Input Speed min-1 3,000 2,500 2,000 1,600 Allowable Mean Input Speed min-1 900 800 700 600 Positioning Accuracy Max arcsec 90 60 40 Repeatability Max arcsec ±10 ±7 ±5 Surface Runout Max μm 10 Allowable Axial Load N 999 1,657 3,302 3,724 8,178 Allowable Radial Load N 669 1,359 2,819 3,109 7,452 Allowable Moment Load N・m 33 79 210 284 764 Product Weight kg 2.5 5.6 11.6 21.5 36.3 Oil Lubrication * Made to order. Model RA40 RA63 RA80 RA100 RA125 Gear Ratio 15 20 20 30* 20 30* 20 30* Max Torque for Starts/Stops N・m 71.0 159.2 249.0 182.1 695.4 308.2 1,155.6 784.8 Maximum Allowable Input Speed min-1 3,000 Allowable Mean Input Speed min-1 1,300 1,100 1,000 900 Positioning Accuracy Max arcsec 90 60 40 Repeatability Max arcsec ±10 ±7 ±5 Surface Runout Max μm 10 Allowable Axial Load N 999 1,657 3,302 3,724 8,178 Allowable Radial Load N 669 1,359 2,819 3,109 7,452 Allowable Moment Load N・m 33 79 210 284 764 Product Weight kg 2.5 5.6 11.6 21.5 36.3 Operating Precautions Do not operate the RollerDrive under conditions where the surface temperature may rise above 60℃. Operation under high temperatures can degrade lubrication oil.