Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S
The AirTAC SAIJ125X600-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force at 0.5 MPa and features a 600 mm nominal stroke that can be dialed back by up to 50 mm, yielding a precise 550-600 mm usable travel window. This built-in adjustability allows operators to fine-tune end positions at commissioning without swapping out the cylinder or adding external stops.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, utilizing PT tapered port threads and a robust 32 mm carbon steel rod. It relies on variable air cushions at both ends to decelerate the load. Because the rear adjuster functions strictly as a travel stop rather than a lock, it will not hold the load without live air; for position holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125X600-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125X600-50S Is Used
Machine Changeover
Dial in the 550-600 mm travel window during product size changes without physically replacing the cylinder or repositioning hard stops.
Heavy Payload Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy assemblies, using the rear screw to fine-tune the final resting position.
Assembly Line Setup
Achieve precise end-of-stroke tuning during initial commissioning on automated lines, utilizing the 30-500 mm/s speed range for controlled movements.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-50S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires the 6136 N push force at 0.5 MPa and on-the-fly end-position tuning across a 550-600 mm window. If your setup only needs 2805 N of push force, stepping down to a 63 mm bore saves space, but the 125 mm bore is ideal for heavier payloads. The adjustable stroke is chosen over a fixed SAI cylinder when machine changeovers require variable end stops. To replace an ISO 15552 cylinder, match the 125 mm bore, 600 mm stroke, 50 mm adjustment, PT ports, and the -S magnet.
With a 600 mm stroke, the 32 mm carbon steel rod and M27x2 thread provide substantial rigidity, but an external guide is still recommended to manage side loads on long unsupported travels. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125X600-50S FAQ
The rear adjuster acts as an external stopper that trims the effective travel. For this model, the 600 mm nominal stroke can be reduced by up to 50 mm, providing a usable travel window of 550-600 mm. The adjuster only sets the travel end and does not lock the load without live 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. The maximum push force is 11045 N at 0.9 MPa.
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