Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50S 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 SAIJ125AX1000-50S
The AirTAC SAIJ125X1000-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a 1000mm nominal stroke that can be fine-tuned down by up to 50mm, yielding a usable travel window between 950 and 1000mm. This specific SKU includes a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and a magnet (-S) for use with CMSE reed or DMSE electronic sensors.
Because the barrel is an extruded aluminum profile rather than a tie-rod design, it integrates sensor grooves on both sides for straightforward switch mounting. The rear adjuster functions strictly as a mechanical stop to dial in the end position during commissioning; it does not lock the load. For applications requiring position holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50S |
|---|---|
| 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 SAIJ125AX1000-50S
| 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 SAIJ125AX1000-50S Is Used
Variable Length Cutoff
Dial the rear stop back from 1000mm to 950mm to quickly adapt a long-stroke cutoff or clamping station to different material lengths without changing hardware.
Machine Changeover
Fine-tune the extended end position during product family transitions, using the 50mm adjustment window to set precise positioning by hand at commissioning.
Long-Stroke Material Handling
Move heavy workpieces along an extended 1000mm axis, relying on 6136N of thrust and SUS420J2 rod durability for demanding industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50S the Right Cylinder?
Choose this 125mm bore when a smaller 100mm cylinder lacks thrust (providing only 3927N at 0.5 MPa) or when a 160mm unit is unnecessarily large. The 50mm adjustment range is ideal for product-size changeovers on a line, allowing operators to shift the end-stop from 950 to 1000mm without swapping the cylinder. The PT tapered port threads match standard pneumatic fittings, and the reduced SAIJ mounting set supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments.
With a 1000mm stroke, the 32mm diameter rod is highly susceptible to side-loading and sagging. An external guide mechanism must be used to prevent binding and premature seal wear. The cylinder operates at speeds of 30-500mm/s, and while the built-in air cushions absorb end-of-stroke kinetic energy, they do not serve as a braking lock.
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 SAIJ125AX1000-50S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At a maximum 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster acts as an external stopper that shortens the effective travel. For this 1000mm stroke model, you can trim the extension back by up to 50mm, creating a usable travel window of 950 to 1000mm to fine-tune the end position without external stops.
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