Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40
The AirTAC SAIJ125X130-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 90 to 130 mm, allowing you to dial back the nominal 130 mm stroke by up to 40 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks with precision.
This model uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread, which provides substantial rigidity for high side-load tolerance. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE or DMSE switches, though no magnet is specified for this configuration.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-40 Is Used
Variable End-Stop Machining
Fine-tune the 90-130 mm travel window during production runs to accommodate varying workpiece lengths without changing out the entire actuator assembly.
Machine Setup and Changeover
Use the 40 mm rear adjustment screw to precisely set the retract end-position at commissioning, ensuring perfect alignment when switching between product families.
Heavy Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa for robust joining operations, dialing back the stroke slightly to control the exact depth of the press fit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40 the Right Cylinder?
Choose this 125 mm bore when 6136 N of thrust at 0.5 MPa is required, stepping up from a 100 mm bore that provides 3927 N. The adjustable 90-130 mm travel window is ideal for product changeovers where the exact end-of-stroke position varies, eliminating the need to swap cylinders or bolt on external stops. For any load-holding requirements without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock; consider an AirTAC SAIL or BSAI cylinder instead.
When specifying an ISO 15552 replacement match, verify the 125 mm bore, 130 mm stroke, 40 mm adjustment range, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Since the total stroke is 130 mm, side-load is minimal, but an external guide is still recommended for heavy lateral forces.
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 SAIJ125X130-40 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as an external stopper that lets you shorten the effective stroke from 130 mm down to 90 mm. It only sets the travel end and provides deceleration; it does not lock or hold the load without live air pressure.
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