Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S
The AirTAC SAIJ125X290-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position at commissioning without adding external stops. Based on a 290 mm nominal stroke, the external screw provides up to 30 mm of trim, creating a precise 260-290 mm usable travel window for product changeovers. It delivers substantial force, generating 8590 N of push thrust at 0.7 MPa and 11045 N at 0.9 MPa.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance and includes a magnet (-S) for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses PT tapered G1/2 ports and offers self-compensating air cushions at both ends to manage kinetic energy across its 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125AX290-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125AX290-30S Is Used
Product Changeovers
Dial in the exact end-stop during format size changes on a packaging line, utilizing the 30 mm adjustment window to switch product widths without mechanical teardown.
Machine Setup Tuning
Fine-tune the retraction end position at commissioning to perfect a pressing operation, trimming the 290 mm nominal stroke back to the exact required datum.
Variable End Stops
Adjust the effective travel window from 260 to 290 mm on heavy-duty material handling equipment to accommodate varying workpiece lengths on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-30S the Right Cylinder?
Choose this adjustable-stroke model when your application demands variable end-stops or frequent machine setup changes, eliminating the need to physically swap out a fixed-stroke SAI cylinder. If your thrust requirements are lower, stepping down to a 100 mm bore yields 5497 N of push force at 0.7 MPa. Because the 290 mm stroke is substantial, ensure you provide an external guide to handle side loads, as the 32 mm rod and M27x2 thread carry limits despite their robust size. The rear adjuster acts strictly as a travel stop for deceleration, not a lock; a plain SAIJ cannot hold a load without live air, so specify a SAIL or BSAI cylinder if drop-prevention is required.
This SKU is dimensionally interchangeable per ISO 15552, featuring a PT G1/2 port, a 260-290 mm adjustment window, and a -S magnet. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR accessories.
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 SAIJ125AX290-30S FAQ
This 125 mm bore cylinder generates 6136 N of push force at 0.5 MPa, 8590 N at 0.7 MPa, and 11045 N at 0.9 MPa. The pull force at 0.5 MPa is 5734 N.
The rear adjuster screw allows you to shorten the 290 mm nominal stroke by up to 30 mm, providing a usable travel window of 260-290 mm. This stop only sets the travel end and does not lock or hold the load without live air pressure.
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