Characteristics:
1. Compact structure, light weight, large tension.
2. Low cost, simple application.
3. High accuracy. It is suitable for tension of single-size bolt.
Parameter:
| Model | Suitable bolt mm | Maximum output kn | Outside diameter (mm) | Minimum height mm | Minimum span mm | Minimum clearance mm | Stroke (mm) |
| JRA18 | M18 | 179 | 62 | 76 | 46 | 114 | 12 |
| JRA20 | M20 | 212 | 66 | 78 | 51 | 123 | 12 |
| JRA22 | M22 | 303 | 72 | 86 | 51 | 133 | 12 |
| JRA24 | M24 | 323 | 78 | 88 | 59 | 137 | 12 |
| JRA27 | M27 | 407 | 87 | 93 | 65 | 145 | 12 |
| JRA30 | M30 | 454 | 89 | 96 | 72 | 148 | 12 |
| JRA33 | M33 | 612 | 102 | 103 | 76 | 161 | 12 |
| JRA36 | M36 | 768 | 113 | 108 | 80 | 171 | 12 |
| JRA39 | M39 | 821 | 119 | 112 | 89 | 176 | 12 |
| JRA42 | M42 | 899 | 126 | 114 | 91 | 181 | 12 |
| JRA45 | M45 | 957 | 131 | 118 | 94 | 185 | 12 |
| JRA48 | M48 | 1119 | 143 | 122 | 102 | 195 | 12 |
| JRA52 | M52 | 1328 | 154 | 124 | 110 | 201 | 12 |
| JRA56 | M56 | 1393 | 159 | 138 | 119 | 219 | 12 |
| JRA60 | M60 | 1457 | 165 | 142 | 132 | 227 | 12 |
| JRA64 | M64 | 1696 | 179 | 151 | 132 | 240 | 12 |
| JRA68 | M68 | 1767 | 184 | 155 | 146 | 244 | 12 |
| JRA72 | M72 | 2226 | 202 | 159 | 150 | 256 | 12 |
| JRA76 | M76 | 2518 | 213 | 173 | 160 | 274 | 12 |
| JRA80 | M80 | 2827 | 225 | 177 | 161 | 282 | 12 |
| JRA85 | M85 | 3015 | 237 | 197 | 177 | 307 | 12 |
| JRA90 | M90 | 3604 | 256 | 202 | 177 | 317 | 15 |
| JRA95 | M95 | 3973 | 265 | 218 | 202 | 338 | 15 |
| JRA 100 | M100 | 4476 | 282 | 225 | 212 | 350 | 15 |