Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50 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 SAIJ125X1000-50
The AirTAC SAIJ125X1000-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 950-1000 mm usable travel window, letting you dial back the nominal 1000 mm stroke by up to 50 mm during commissioning without adding external stops. Built with a carbon steel piston rod, it delivers 8590 N of push force at 0.7 MPa and includes variable air cushions at both ends to manage kinetic energy.
This model uses a PT G1/2 port and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE solid-state switches. The rear adjuster acts purely as a travel stop for end-position tuning; it does not lock the load, so a SAIL or BSAI variant is required for load-holding without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50 |
|---|---|
| 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 SAIJ125X1000-50
| 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 SAIJ125X1000-50 Is Used
Machine Changeover Setup
Fine-tune the 950-1000 mm travel window during product size changeovers to set new end stops without physically replacing the cylinder.
Heavy Material Pushing
Leverage the 8590 N push force at 0.7 MPa to move heavy pallets or workpieces along a conveyor line with precision.
Long-Stroke Alignment
Use the extended 1000 mm travel for large-format positioning tasks, relying on the rear stopper to dial in the exact final home position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-50 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 3518 N at 0.7 MPa) lacks the thrust for heavy moving masses, but before stepping up to a 160 mm bore (14074 N at 0.7 MPa) which adds significant physical bulk. The adjustable stroke is ideal for product changeovers on a line, allowing you to fine-tune the end position in seconds rather than swapping a fixed-stroke SAI cylinder. For this 1000 mm stroke, the long unsupported rod is highly susceptible to side-loading and sagging, so an external guide rail is strongly recommended to prevent premature seal wear.
To match this ISO 15552 cylinder for a retrofit, confirm the 125 mm bore, 1000 mm stroke, 50 mm adjustment range, PT G1/2 port, and standard carbon steel rod. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on other series.
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 SAIJ125X1000-50 FAQ
This 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N, with a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 1000 mm down to 950 mm, creating a 950-1000 mm usable window. This stopper only sets the end position and decelerates the travel; it does not lock the load without live air pressure.
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