Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-75
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-75 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 JSIJ40X300-75
Generating 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder delivers a 300 mm extend stroke that can be shortened on site by up to 75 mm via an external stop screw. The retract end remains fixed, while the usable extend range becomes 225 to 300 mm so you can fine-tune the end position without physically swapping the actuator. Its extruded hard-anodized aluminium barrel omits tie rods entirely, making the body shorter and more compact than a same-bore ISO 15552 unit.
Equipped with a G1/4 port and a 16 mm rod, it handles about 377 N of real work, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin. Adjustable air cushions of 20.5 mm at each end absorb kinetic energy near the stroke limits. Note that this specific SKU lacks a magnet and cannot accept CMSE or DMSE sensors; adding the -S variant enables that capability. Furthermore, the cushion only decelerates the piston, so an external rod lock or pilot-operated check valve is required to hold a load securely against air loss.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-75 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-75 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 JSIJ40X300-75
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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 JSIJ40X300-75 Is Used
Adjustable End-Stop Clamping
Dial in the exact clamping distance on-site across a 225 to 300 mm window, accommodating varying part widths without changing the cylinder.
Transfer Pusher Fine-Tuning
Set the precise push-off position for diverter arms on a packaging line, using the external adjuster to match different product lengths.
Shared Spare Actuator
Keep one cylinder in stock and shorten the extend stroke as needed to replace units across multiple machines with slightly different fixed strokes.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-75 the Right Cylinder?
When sizing this actuator, consider the neighbouring bores: a 32 mm bore yields 402 N push at 0.5 MPa for lighter duties, whereas a 50 mm bore provides 982 N if your application demands more power. The -75 mm adjustable window is particularly useful when you need to dial in a precise end position on the machine or want a single spare part that covers several stroke length variants. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2 brackets. Because this is a 300 mm stroke, always guide the load externally to prevent rod bending and excessive side loading. As a non-magnetic SKU, it cannot support position sensing.
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 JSIJ40X300-75 FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it delivers 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. This 40 mm bore unit uses a G1/4 air port, a 16 mm rod, and features 20.5 mm adjustable air cushions at both ends.
The nominal 300 mm stroke is the maximum extend length. An external stop screw allows you to shorten the extend stroke on-site by up to 75 mm, giving a usable extend range of 225 to 300 mm. The retract end is fixed. This mechanism sets the end position and does not lock the load; you need an external rod lock or pilot-operated check valve to hold a load securely.
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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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