Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-20S 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 JSIJ40X250-20S
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder saves machine space by being noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminum barrel keeps the assembly light without external tie rods. It handles about 377 N of real work safely, which means you can lift roughly 32 kg vertically with a 2:1 margin.
The built-in -S magnet allows CMSE or DMSE sensors to drop directly into the side grooves for position detection. An external adjuster lets you shorten the extend stroke on-site by up to 20 mm, giving a usable range of 230 to 250 mm without swapping the cylinder. Air connects via a G1/4 port, and adjustable cushions decelerate the load at both ends.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-20S |
|---|---|
| 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 JSIJ40X250-20S
| 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 JSIJ40X250-20S Is Used
Clamp Position Tuning
Dial in the exact 230 to 250 mm extend reach on a machining fixture so varying part thicknesses clamp perfectly without rebuilding the actuator block.
Transfer Gate Dwell
Adjust the extend stop by up to 20 mm on a sorting diverter to alter the resting position and fine-tune package routing on the fly.
Vertical Lift Stop
Lift roughly 32 kg of goods and use the external adjuster to set a precise upper travel limit, preventing overshoot into overhead structures.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X250-20S the Right Cylinder?
When sizing this unit, the 32 mm bore offers less force (402 N push at 0.5 MPa) while the 50 mm bore provides more (982 N push). The adjustable stroke feature is ideal when you need to fine-tune the extend end position on-site or want a single spare part covering several stroke variants. You can mount it using basic, FA, LB, TC, TCM1, or TCM2 brackets. Because this unit has the -S magnet, it is ready for CMSE/DMSE switches. For any stroke of 300 mm or longer, always use a guide rail to prevent side-load damage to the rod seals.
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 JSIJ40X250-20S FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it provides 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. The air port size is G1/4.
The nominal 250 mm stroke is the maximum length. The external adjuster lets you shorten the extend stroke on-site by up to 20 mm, giving a usable extend range of 230 to 250 mm. The retract end remains fixed. This mechanism only sets the end position and does not lock the load.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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