Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40
The AirTAC SAIJ125X115-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 6136N pull force at 0.5MPa and a 11045N push force at 0.9MPa. The external rear stopper allows you to fine-tune the effective travel down to a 75-115mm window without adding external stops.
This model uses a PT tapered G1/2 port and a 32mm carbon steel rod. It includes adjustable air cushions at both ends (40mm cushion length) and operates at 30-500mm/s. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this SKU omits the internal magnet.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125X115-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125X115-40 Is Used
Variable End Stops
Set precise retract positions for multi-product tooling lines without physically changing the cylinder setup.
Machine Setup
Fine-tune the 75-115mm travel window during commissioning to perfectly align heavy actuators.
Product Size Changes
Quickly adapt automated machinery to different material lengths by dialing the rear stopper.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-40 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (3927N push at 0.5MPa) lacks the thrust for your tooling, but a 160mm bore is oversized. The 40mm adjustment range is ideal for product changeovers, letting you dial in the end position during commissioning rather than swapping the cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
The rear adjuster acts strictly as a travel stop for deceleration, not a lock. It will not hold the load without live air pressure; for fail-safe load holding, use an AirTAC SAIL or BSAI cylinder. For ISO 15552 replacement, match the 125mm bore, 115mm stroke, 40mm adjustment, PT G1/2 port, and the specified mounting set.
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 SAIJ125X115-40 FAQ
At 0.5MPa, it delivers 6136N of pull force and 8590N of push force. At 0.9MPa, the push force increases to 11045N.
The rear adjuster screw shortens the 115mm nominal stroke by up to 40mm, creating a usable travel window of 75-115mm to fine-tune the end position.
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Standard models usually ship in 3-4 days.
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