Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 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 JSIJ125X25-30S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder is built for heavy-duty positioning. The extruded hard-anodized aluminium barrel omits tie rods, making the body noticeably shorter and more compact than a same-bore ISO 15552 unit. A G1/2 port feeds the chamber, while adjustable air cushions of 33 mm at each end absorb impact. The built-in -S magnet allows CMSE/DMSE sensors to drop directly into the side grooves for precise end-of-stroke detection.
The -30 code defines a 30 mm external adjuster window that shortens the 25 mm extend stroke on-site, letting you fine-tune the end position without swapping the cylinder. This translates to a safe working load of about 3682 N, or roughly 313 kg lifted vertically with a 2:1 margin. Note that a plain cylinder drifts on air loss; the cushion only decelerates, so fit an external rod lock or pilot-operated check valve to hold a suspended load.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 JSIJ125X25-30S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | 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 JSIJ125X25-30S Is Used
Press Clamping
Uses the 30 mm adjuster to dial in the exact 15 mm clamping contact on heavy steel blanks without changing the cylinder body.
Pallet End Stop
Halts loaded pallets using the full 6136 N push force, fine-tuning the stop position on-site to match varying load widths.
Lift Gate Alignment
Leverages the -S magnet for CMSE/DMSE position feedback while setting the precise extend endpoint for heavy lift gates.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30S the Right Cylinder?
At the top of the range, this 125 mm bore pushes 6136 N at 0.5 MPa; stepping down to a 100 mm bore yields 3927 N, which is insufficient if you need the full 8590 N available here at 0.7 MPa. The adjustable stroke is ideal for sharing a spare across stroke variants or finalizing a hard stop on-site. JSIJ mounting options include FA, LB, TC, TCM1, and TCM2. The -S magnet supports CMSE/DMSE switches. Even at 25 mm, guide side loads carefully on 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 JSIJ125X25-30S FAQ
This 125 mm bore cylinder features a G1/2 port and delivers 6136 N push / 5734 N pull at 0.5 MPa, and 8590 N push / 8028 N pull at 0.7 MPa. The theoretical maximum force is 1251 kgf at 1.0 MPa.
The external stop screw provides a 30 mm window to shorten the extend stroke on-site. The nominal 25 mm stroke is the maximum, and the retract end remains fixed. The stop sets the end position but does not lock the load.
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