Technical Data Linear actuator Linispeed Jack Handling
This section describes the general handling of Linispeed jacks.
For details, please refer to the instruction manual included with the product.
Maintenance/Inspection
- ・The screw shaft and gear unit are applied with grease or filled with oil upon delivery. Please install the pressure vent to the appropriate position. Standard grease applied to the screw shaft and oil filled in the gear unit are shown in Table 1. Oil and grease are important factors to ensure performance, product life, and efficiency of the jack. Only use the designated grease and oil types.
- ・Use Table 2 as a guide when applying grease to the screw shaft. Refer to Table 3 for the amount of lubricant supplied to the screw shaft. To apply grease, move the screw shaft to its maximum stroke, wipe off the old grease, and then apply it directly to the screw shaft with a grease gun or brush. After lubrication, operate the nut at full stroke to promote lubrication of the inside of the nut.
- ・The recommended lubrication intervals for the gear unit are shown in Table 2. However, these intervals may vary depending on operation frequency and usage conditions. Remove the pressure vent attached to the gear unit and pour in oil until it seeps from the plug hole to the oil gauge center position. After changing the oil, firmly tighten the pressure vent. Please refer to Table 4 for the plug sizes.
The first replacement should be carried after 1000 hours of operation or after three months, whichever comes earlier.
Depending on operating conditions, the second and subsequent replacements should be carried out every 5000 hours of operation or each year, whichever comes earlier.
Draining the oil immediately after operation can be performed easily when the temperature is still high, but it can be very dangerous which may lead to the oil spurting out and cause serious burns.
Please confirm that the surface temperature of the gear unit is lower than 40°C to 50°C level before draining the oil.
When draining and changing the oil, we recommend that you clean the inside of the case using the replacement oil.
Table 1 Specified lubricants
| Use classification | Company name | Lubricant name |
|---|---|---|
| Threaded portion | Cosmo Oil Lubricants | Cosmo Molybdenum Grease Special No. 2 |
| Reducer | Idemitsu Kosan | Daphne Alpha Oil TE150 |
※The product names mentioned above are trademarks or registered trademarks of each manufacturer.
Table 2 Lubrication and oil change intervals
| Frequency of use | Lubrication cycle | Oil change interval |
|---|---|---|
| Ball screw shaft | Reducer | |
| 1001 or more cycles per day | 1 to 3 months | 5000 hours or yearly |
| 501 to 1000 cycles/day | 3 to 6 months | |
| 500 or less cycles per day | 6 mo.s to 1 yr. |
※The above values differ from the life of the screw and reducer unit.
Table 3 Grease application and oil filling amount
| Frame number | Lubrication amount | Initial filling amount |
|---|---|---|
| Screw shaft (per 100mm stroke ) | Reducer | |
| SJ015H | 10～15g | 0.31L |
| SJ030H | 10～15g | 0.49L |
| SJ050H | 20～30g | 1.02L |
Table 4 Plug size
| SJ015H | 1/4″ |
|---|---|
| SJ030H | 1/4″ |
| SJ050H | 3/8″ |
- ・When using jack(s), regularly inspect the condition of the screw face and backlash. If metal particles due to excessive abrasion of the screw face are discovered, the mechanism has reached the end of the product life. In addition, if backlash of the gear system (play between the input shaft and the worm wheel) exceeds an input shaft rotation angle of 30 degrees, it is necessary to replace the entire gear system. Continued usage after any of these issues are identified may lead to unstable rotation of the screw and input shafts, or may even cause the screw shaft to suddenly drop down.
