Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40
The AirTAC SAIJ125X150-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 110-150 mm usable travel window, letting you dial back the 150 mm nominal stroke by up to 40 mm during commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
Delivering 6136 N of pull force at 0.5 MPa, this 125 mm bore unit uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread. The robust rod diameter handles substantial side loads, while adjustable air cushions at both ends manage deceleration. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 SAIJ125 Adjustable Cylinder SAIJ125X150-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 Is Used
Machine Changeover
Quickly fine-tune the 110-150 mm travel window during product size changes on a packaging line without replacing the cylinder.
Variable End Stops
Dial in the exact retracted position for a heavy press operation, using the 40 mm rear adjustment screw to set the precise endpoint.
Assembly Calibration
Adjust the stroke on the fly during commissioning to align a 6136 N clamping mechanism perfectly with the workpiece.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end positions or product changeovers, avoiding the need to physically swap a fixed-stroke SAI cylinder. If your application needs less force, stepping down to a 100 mm bore yields 3681 N of pull at 0.5 MPa. For higher force, a 160 mm bore provides 9425 N.
To replace an ISO 15552 cylinder, match the 125 mm bore, 150 mm stroke, 40 mm adjustment, PT G1/2 port, and your required mounting from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the adjuster only sets the travel end, use a SAIL or BSAI locking cylinder if the load must be held without continuous air pressure.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ 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 Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-40 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 150 mm down to 110 mm. It sets the travel end but does not lock or hold the load without continuous air pressure.
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