Daiwa Kenko, Jack, Japan, Lifting
Daiwa Kenko U Type Preload Jack (Strong Type)
Manufacturer: Daiwa Kenko
Model: U20; U25; U30; U35; U40; U50
This U type of preload jack is a model with further enhanced hydraulic pressure and mechanical strength compared to the H type.
It is used when the design axial force and the axial force at the time of disassembly are expected to be large.
The axial force of the girder can be measured by attaching an axial force measuring device (PGB).
Specification
| Model No | U20 / U25 | U30 | U35 | U40 | U50 | |
|---|---|---|---|---|---|---|
| Applicable beam size | H200 / H250 | H300 | H350 | H400 | H500 | |
| Plate hole dimensions A x B | mm | 140 x 140 | 220 x 220 | 250 x 250 | 290 x 290 | 370 x 390 |
| Oil pressure | KN | 400 | 1,800 | 2,500 | 2,800 | 5,000 |
| tf | 40 | 180 | 250 | 280 | 500 | |
| Screw yield strength | KN | 1,500 | 3,500 | 4,000 | 4,500 | 6,000 |
| tf | 150 | 350 | 400 | 450 | 600 | |
| Stroke: S | mm | 125 | 150 | 150 | 150 | 220 |
| Machine height: C (no adjustment material) | mm | 440 | 485 | 485 | 485 | 690 |
| Weight (without adjustment material) | ㎏ | 64 | 210 | 270 | 330 | 790 |
| Weight (with adjustment material) | ㎏ | 84/92 | 270 | 354 | 440 | 1,050 |
| Pressure receiving area | ㎠ | 50.24 | 213.72 | 283.39 | 362.87 | 637.62 |
| Axial force measurement | KN | 400 | 1,800 | 2,500 | 2,800 | 5,000 |
| tf | 40 | 180 | 250 | 280 | 500 | |
| Maximum amount of oil | L | 0.7 | 3.3 | 4.3 | 5.5 5.5 | 14.1 |
| Dimension | ||||||
* Weight (with adjustment material) is the weight when h = 100 mm (U50 only h = 150 mm) is attached to both ends.
* U20 / U25 can be compatible with H200 / H250 by changing the adjustment material.
Combination example 
Strength test
Instructions (video)
Adjusting Material
Instructions for vertical use
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