Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 275mm stroke, G1/2 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ125 mm
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 33 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty actuation into a compact footprint. The extruded hard-anodized aluminium barrel is notably shorter than a same-bore ISO 15552 unit, saving machine space without losing power. A G1/2 port feeds the 32 mm piston rod, yielding a safe working load of about 3682 N, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
The external stop screw lets you trim the extend stroke by up to 75 mm on-site, giving a usable forward range of 200-275 mm while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder, and the 33 mm adjustable air cushions decelerate the mass smoothly. Note that this SKU lacks a magnet, so it cannot take CMSE/DMSE sensors, and the cushion only slows the load—it will not hold position on air loss without an external rod lock.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 Is Used
Heavy Pallet Destrapping
Provides the high push force needed to sever heavy steel strapping on large pallets, with the 75 mm adjuster allowing precise positioning over varying pallet heights.
Press Die Clearance
Sets heavy stamping dies into the press bed, using the on-site stroke reduction to avoid crashing the die into the upper platen during changeovers.
Bulk Container Squaring
Squares oversized bulk containers before filling, fine-tuning the extend end position to accommodate slight dimensional variances between reusable totes.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 the Right Cylinder?
When sizing this unit, stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927 N, while moving up is not possible as 125 mm is the largest JSIJ option. The 75 mm adjustable window is ideal for sharing a single spare across several stroke variants or finalizing end positions during machine commissioning. Mounting choices include Basic, FA, LB, TC, TCM1, and TCM2. Because the 275 mm stroke exceeds 300 mm, ensure external guide rails are used to absorb side loads. Finally, this non-S SKU cannot support magnetic sensing; add the -S variant if you require CMSE/DMSE switches.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75 FAQ
At 0.5 MPa it pushes 6136 N and pulls 5734 N; at 0.7 MPa it pushes 8590 N and pulls 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 port, a 32 mm rod with an M27x2.0 thread, and 33 mm adjustable cushions. Operating speed is 30-500 mm/s.
The nominal 275 mm extend stroke is the maximum length. An external stop screw lets you shorten the forward stroke by up to 75 mm on-site, yielding a usable extend range of 200-275 mm. The retract end remains fixed, allowing you to set the exact forward end position without changing the cylinder.
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Standard models are processed and dispatched in 3-5 business days.
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