Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S
The AirTAC SAIJ125X950-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, utilizing a robust 32mm carbon steel rod with an M27x2 thread. Because the 950mm stroke exceeds the standard 1500mm limit for this bore, it is manufactured as a made-to-order non-standard unit. The built-in rear stopper provides a 920-950mm usable travel window, allowing precise end-position tuning without external stops.
This model includes a magnetic piston (-S) for position sensing, compatible with AirTAC CMSE reed and DMSE electronic switches fitted into the dual-side sensor grooves. The extruded aluminum barrel design omits tie-rods, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories. It uses PT tapered port threads and variable air cushions at both ends to decelerate the load effectively.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125X950-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125X950-30S Is Used
Long-Reach Machining
Ideal for positioning heavy fixtures on large machine tools where the 950mm reach requires fine 920-950mm end-tuning to avoid collision.
Pallet Changeover
Adjusts the retract end-stop on the fly when switching between different pallet lengths on a transfer line without swapping cylinders.
Large Assembly Press
Provides 6136N of push force at 0.5 MPa for heavy part seating, with the rear screw allowing precise clamp-depth calibration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30S the Right Cylinder?
Select this non-standard 950mm unit when your machine requires a long reach that exceeds standard catalog strokes but still demands fine-tuning during commissioning. The 30mm adjustment range is ideal for dialing in exact end-of-stroke positions during product changeovers. If your application requires less force, stepping down to a 100mm bore yields 3927N push at 0.5 MPa. For higher dynamics, a 160mm bore provides 10053N. Because the stroke is 950mm, an external guide is strongly recommended to prevent excessive side-loading on the rod.
The rear adjuster screw acts strictly as a travel stop and works alongside the air cushions for end-of-stroke deceleration. It does not lock or hold the load without continuous live air pressure. If your machinery needs true load-holding without air, consider the SAIL series with an air-released lock, the BSAI clamp-lock cylinder, or an external pilot-operated check valve. For ISO 15552 mounting interchangeability, verify your bore, 950mm stroke, 30mm adjustment, PT ports, and -S magnet requirements.
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 SAIJ125X950-30S FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 1251 kgf.
The rear adjuster screw allows you to shorten the 950mm nominal stroke by up to 30mm, creating a 920-950mm usable travel window. It acts as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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