331 RPrecautions on handling Ball Screws t 1SFDBVUJPOT PO )BOEMJOH (1) Removing the ball nut from the screw shaft causes the ball to fall out rendering the ball screw unusable. Do not disassemble Ball Screws. It may attract dusts and degrade assembly accuracy. Use dedicated temporary shafts when removing Ball Nuts. (2) Do not give an external impact to a screw shaft outer diameter, thread and recirculation parts. It may cause recirculation failure and a malfunction. (3) Do not tilt the ball screw assembly since a ball screw nut may spin off from a screw shaft due to its own weight. Especially when using a ball screw vertically, place a fall-off prevention mechanism since a ball screw nut may spin off due to its own weight. (4) When inspecting the sliding, fix the nut and cause the shaft to rotate, or fix the shaft and cause the nut to rotate. t $BVUJPOT PO VTF (1) Use Ball Screws in clean environments. Use covers, etc. to prevent intrusion of dusts and chips that may cause damages and performance degradations to ball recirculation components. (2) Do not let a ball screw nut overrun. It may cause the balls to fall out or damage the ball recirculation parts. (3) Avoid using Ball Screws at a temperature of more than 0~80°C. It may damage recirculation parts or seal parts. (4) Do not misalign or tilt ball screws shaft support side and a ball screw nut. Life hours may become extremely short due to an offset load to a ball screw nut. (1) Caution on Contaminations (2) Application of impacts to Nuts is prohibited (1) Do not remove the Nuts RRolled Ball Screws t About Removing Ball Screws If the nut is removed from the shaft, the balls contained in the nut will fall out and the ball screw will become unusable Use dedicated temporary shafts when removing Ball Nuts. MISUMI provides various temporary shafts as option. To order a dedicated temporary shaft together with Ball Screws, add alterations code "-TAS" to the end of a part number. YNuts cannot be removed using the temporary shafts with Precision Ball Screw BSX, BSS, BSSE, C-BSS and Rolled Ball Screw C-BSSC. Fig. 4 Temporary Shaft (TAS) Screw Shaft Nut Part Number - L - F - P - (TAS) BSSZ1510 BSSR2005 - - 300 700 - F30 - P12 - - TAS TAS t $BVUJPO PO VTF PG 5FNQPSBSZ 4IBGU When Taking Out Ball Screws Nut from Screw Shaft t Stand a screw shaft vertically and place a temporary shaft to the screw shaft support side edge in consistent with screw shaft center. (Refer to Fig. 2)(*) t Lightly rotate the nut and install it onto the temporary shaft. (Refer to Fig. 4) t After confirming that both nut edges are on the temporary shaft, take out the temporary shaft from the screw shaft. t Store the assembly while ensuring that the nut does not fall off of the temporary shaft. When Installing Ball Screws Nut to Screw Shaft t Stand a ball screw shaft vertically and place a temporary shaft to the screw shaft support side edge in consistent with screw shaft center. t Rotate the nut with pressing the screw shaft lightly and install it into the shaft. t In case there is any interference, do not insert the ball screw forcibly. Try reassembling. (*) In BSSZ, BSSR0802, BSSR0804, BSSR1002, BSSR2510, BSST0802 and BSST2510, the screw shaft support side and the temporary shaft are placed as shown in the following Figure 3. Since TAS is unstable, grip TAS firmly from the above until the installation is finished. Fig. 2 Temporary Shaft Screw Shaft Support Side Screw Shaft Fixed Side Fig. 3 Temporary Shaft Screw Shaft Support Side Temporary Shaft Nut Fig. 1 (4) Inspection by reverse operation (3) Caution for free fall (3) Caution of temperature of usage environment Maximum 80°C Minimum 0°C 0 20 60 90 120 150 °C (2) Do not let a nut overrun If the nut edges exceed this range, the balls will fall out causing malfunctions. Ball Screws Precautions on Handling
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