Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 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 JSIJ125X100-50S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder is built for heavy-duty positioning. Its extruded hard-anodized aluminum barrel omits tie rods entirely, making the body shorter and more compact than a same-bore ISO 15552 unit. The G1/2 port feeds the massive 125 mm piston, yielding a theoretical maximum output of 1251 kgf at 1.0 MPa.
The -50 code means an external stop screw lets you shorten the extend stroke on-site by up to 50 mm, dropping the usable extend travel from the 100 mm maximum down to 50 mm without changing the cylinder itself. This on-site tuning is perfect for dialing in exact end positions. In practical terms it handles about 3682 N of safe working load, or roughly 313 kg lifted vertically with a 2:1 margin. The -S suffix adds a piston magnet for CMSE/DMSE switches in the side grooves.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 JSIJ125X100-50S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×100 | 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 JSIJ125X100-50S Is Used
Press Fit Tuning
Dial in the exact insertion depth of heavy bearings by adjusting the extend stroke on-site with the external stop screw, avoiding mechanical rebuilds.
Pallet Stopper Gate
Act as a high-force pneumatic stop gate on a conveyor, using the 50 mm adjuster window to accommodate different pallet heights without swapping cylinders.
Heavy Lift Positioning
Lift and place 300 kg industrial components vertically, relying on the 6136 N push force and precise end-position tuning for safe, accurate landing.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50S the Right Cylinder?
At the top of the size range, this 125 mm bore pushes 6136 N at 0.5 MPa; if that exceeds your needs, stepping down to the 100 mm bore drops the push force to 3927 N while saving envelope space. The adjustable stroke is ideal when you need a shared spare across slight stroke variants or want to fine-tune the extend end position on the machine. Mounting options include FA, LB, TC, TCM1, and TCM2. The integrated -S magnet supports CMSE/DMSE sensors for position feedback. Because the stroke is 100 mm, side loads are minimal, but always guide the load for any stroke over 300 mm.
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 JSIJ125X100-50S FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa it delivers 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 port and a 33 mm adjustable air cushion at each end.
The nominal 100 mm stroke is the maximum extend travel. The external adjuster lets you shorten that extend stroke on-site by up to 50 mm, giving a usable range of 50 to 100 mm. The retract end remains fixed. This stop only sets the end position; it does not lock the load on air loss.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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