Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100S 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 SAIJ125AX115-100S
The AirTAC SAIJ125X115-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window from 15 to 115 mm. It delivers a robust 6136 N push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa, making it ideal for heavy-duty positioning tasks.
This unit includes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and comes with a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the rear stopper screw sets the end position without acting as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100S |
|---|---|
| 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 SAIJ125AX115-100S
| 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 SAIJ125AX115-100S Is Used
Product Changeovers
Dial in the exact end position from 15 to 115 mm during production line size changes without adding external stops.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or actuators with precision.
Commissioning Tuning
Fine-tune the retract end-position during initial machine setup to perfect timing and mechanical sync.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100S the Right Cylinder?
Choose this 125 mm bore when 80 mm falls short (delivering only 2513 N at 0.5 MPa) but you want to avoid stepping up to the 160 mm size. The 100 mm adjustment range is perfect for machine setups requiring frequent product-size changeovers, allowing you to dial in the exact end position without swapping out the physical cylinder. The PT tapered port thread matches the G1/2 port size for this bore.
When replacing an ISO 15552 cylinder, verify the 115 mm stroke, 100 mm adjuster, and -S magnet requirement. Because the rear adjuster is a travel stop and not a lock, this cylinder will not hold a load without live air pressure; for true load-holding, consider the SAIL or BSAI series instead.
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 SAIJ125AX115-100S FAQ
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back by up to 100 mm. For the SAIJ125X115-100-S, this creates a usable travel window of 15 to 115 mm without needing to swap the cylinder.
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
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