Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S
The AirTAC SAIJ125X1000-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 950-1000 mm. Delivering a 0.5 MPa pull force of 5734 N, it handles heavy linear motion tasks. The barrel features sensor grooves on both sides, and the integrated -S magnet works seamlessly with CMSE reed and DMSE electronic solid-state switches.
This adjustable-stroke model uses a PT tapered port thread and a robust 32 mm carbon steel rod with an M27x2 thread. The rear adjuster acts purely as a travel stop to fine-tune the end position during commissioning without needing external stops; it does not hold the load without live air pressure. Variable air cushions at both ends manage deceleration across the 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125X1000-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125X1000-50S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 950-1000 mm window during machine setup without adding external mechanical stops.
Product Changeover
Quickly adjust the stroke length by up to 50 mm to accommodate different product sizes on a packaging line.
Heavy Linear Positioning
Utilize the 5734 N pull force to move heavy pallets or fixtures, relying on the M27x2 threaded rod for secure tooling attachment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short of the required thrust, as the 100 mm variant provides only 3681 N of pull force at 0.5 MPa compared to this model's 5734 N. The 50 mm adjustment range is ideal for product changeovers, allowing you to dial in the exact end-stop position without swapping the cylinder. For load-holding requirements without live air, select a SAIL or BSAI cylinder instead, as the adjuster here is not a lock.
For an exact ISO 15552 replacement match, verify the 125 mm bore, 1000 mm stroke, 50 mm adjustment, PT port, and -S magnet. Because this cylinder features a 1000 mm stroke, the long unsupported piston rod is susceptible to side-loading; ensure you use an external guide rail to prevent premature seal wear. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
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 SAIJ125X1000-50S FAQ
The rear adjuster functions as a mechanical stop, allowing you to shorten the effective stroke by up to 50 mm, creating a usable travel window of 950-1000 mm. It is a travel stop, not a lock, and will not hold the load without continuous air pressure.
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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