Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S
The AirTAC SAIJ125X260-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N pull force at 0.5 MPa and features a 10mm adjustment range, creating a precise 250-260mm usable travel window for fine-tuning end positions. The extruded aluminum barrel includes dual sensor grooves, and this -S variant integrates a magnet for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state switches.
Unlike a fixed-stroke SAI unit, the rear adjusting screw allows you to dial in the exact retract position during commissioning or product changeovers without adding external stops. The 32mm carbon steel piston rod and M27x2 thread provide high rigidity, while the PT tapered port threads ensure a tight pneumatic seal. The rear adjuster functions strictly as a travel stop to set deceleration, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAIJ125X260-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SAIJ125X260-10S Is Used
Machine Changeover
Dial in the 250-260mm retract stop during product size transitions without swapping out the entire cylinder or re-engineering external hard stops.
Variable End Stops
Set precise end-of-stroke positions for multi-tiered assembly presses, using the 10mm trim window to compensate for mechanical wear over time.
Heavy Clamping Fixtures
Leverage the 6136N pull force to secure heavy workpieces, using the adjustable stroke to ensure exact clamping depth on varying material thicknesses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-10S the Right Cylinder?
Choose this 125mm bore when a 100mm bore (offering 3681N pull at 0.5 MPa) lacks the thrust for your ejection or clamping task, but a 160mm bore (9425N pull) would be excessive overkill. The 10mm adjustable window is selected when a process requires minor end-position tweaks rather than sweeping stroke changes, providing a fixed SAI footprint but with setup flexibility. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. To replace an ISO 15552 cylinder, match the 125mm bore, 260mm stroke, 10mm adjustment, PT G1/2 port, and -S magnet.
Because the stroke is 260mm, the extended rod is subject to leverage; an external guide rail is recommended to prevent side-load damage. For any application requiring the load to be held in place without live air pressure, note that the rear adjuster and air cushions will not act as a brake—consider an AirTAC SAIL air-released lock, BSAI clamp-lock, or an external pilot-operated check valve instead.
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 SAIJ125X260-10S FAQ
At 0.5 MPa it provides 6136N push and 5734N pull force. At 0.7 MPa the push increases to 8590N. The operational speed range for this 125mm bore is 30-500 mm/s.
A rear stopper screw lets you shorten the 260mm nominal stroke by up to 10mm, providing a 250-260mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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