Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 250mm stroke, G1/4 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.
- BoreØ40 mm
- Stroke250 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- CushionAdjustable, 20.5 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 JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder features a hard-anodized aluminum barrel that is noticeably shorter than a same-bore ISO 15552 unit. The external adjuster lets you shorten the extend stroke on-site by up to 10 mm, meaning the usable extend range is 240-250 mm while the retract end stays fixed. It handles a safe working load of about 377 N, which translates to lifting roughly 32 kg vertically with a 2:1 margin. A built-in piston magnet is included for CMSE/DMSE sensors, and the unit uses a G1/4 port.
This double-acting single-rod actuator runs at 30-800 mm/s with adjustable air cushions providing 20.5 mm of end-deceleration. The stop screw mechanism sets the precise end position without swapping the cylinder, but it is not a load lock. A plain pneumatic cylinder drifts on air loss, so fit an external rod lock or pilot-operated check valve if you need to hold a load safely.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 20.5 mm |
| Max standard stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×250 | 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 JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S Is Used
Clamp Position Trimming
Dial in the exact 240-250 mm extend reach on a machining fixture using the external adjuster, ensuring metal parts seat perfectly without reprogramming the cycle.
Transfer Gate Timing
Fine-tune the diversion gate stroke on a packaging line by up to 10 mm to accommodate slightly different carton widths on the fly.
Vertical Lift Stop
Lift approximately 32 kg of stock using the 40 mm bore, tweaking the extend stop to avoid over-traveling into upper guide rails.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S the Right Cylinder?
When sizing this 40 mm bore, the adjacent 32 mm bore offers 402 N push at 0.5 MPa for lighter duties, while stepping up to the 50 mm bore yields 982 N for heavier cycles. The 10 mm adjustable window is ideal for fine-tuning the extend end position on-site or sharing a spare across stroke variants. JSIJ mounting options include FA, LB, TC, TCM1, and TCM2. The -S suffix means a magnet is present for CMSE/DMSE switches. Because the 250 mm stroke exceeds 300 mm, ensure adequate side-load guidance to prevent rod bearing wear.
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 JSIJ32~50 Adjustable Cylinder JSIJ40X250-10S FAQ
At 0.5 MPa this 40 mm bore cylinder pushes 628 N and pulls 528 N. At 0.7 MPa it pushes 879 N and pulls 739 N. The theoretical maximum force is 128 kgf at 1.0 MPa. It uses a G1/4 air port, a 16 mm rod, and features 20.5 mm adjustable air cushions at both ends.
The -10 indicates a 10 mm external adjuster window. The nominal 250 mm stroke is the maximum, and you can shorten the extend stroke on-site down to 240 mm. The retract end is fixed. This mechanism sets the end position but does not lock the load.
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