Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10
The AirTAC SAIJ125X55-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 45 to 55 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with precision. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration ships without a magnet.
This unit is built with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. It utilizes a 32 mm rod and M27x2 rod thread to manage high side loads, while the variable air cushions at both ends decelerate the heavy 125 mm piston smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAIJ125AX55-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAIJ125AX55-10 Is Used
Product Size Changeovers
Dial in the exact 45 to 55 mm end position during rapid format changes on the production line without swapping out the entire actuator.
Heavy-Duty Clamping Setup
Leverage the 6136 N push force to secure heavy workpieces while fine-tuning the clamping depth via the 10 mm rear adjustment screw.
Machine Commissioning
Trim the effective stroke by up to 10 mm during initial commissioning to prevent mechanical interference and optimize cycle timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10 the Right Cylinder?
Choose this 125 mm bore when a smaller 100 mm cylinder lacks thrust; stepping up from 100 mm increases push force from 3927 N to 6136 N at 0.5 MPa. The 10 mm rear adjuster is selected over a fixed-stroke SAI cylinder when you need to dial in a precise end position during machine setup or product changeover without adding external stops. Because the stroke is only 55 mm, side-load risks are minimal, but always guide the load externally for rigid stability.
Remember that the rear adjuster acts strictly as a travel stop, not a locking device. The cylinder cannot hold a load without live air pressure. For dead-air load holding, integrate an external pilot-operated check valve or select an AirTAC SAIL or BSAI locking cylinder. This model is dimensionally interchangeable per ISO 15552 and uses the standard SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX55-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At its maximum 1.0 MPa pressure, it delivers a top push force of 8590 N.
The rear adjusting screw acts as a mechanical stop that trims the effective travel back from the 55 mm nominal stroke. This creates a 45 to 55 mm usable window, allowing you to set the exact retract end position at commissioning without external stops.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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