Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S
The AirTAC SAIJ125X35-10-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 25-35 mm, letting you dial back the 35 mm nominal stroke by up to 10 mm during machine setup. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty tasks. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet enables precise position detection using AirTAC CMSE reed or DMSE solid-state switches.
This adjustable-stroke design eliminates the need to physically swap cylinders or add external stop blocks when fine-tuning end positions. The rear adjuster acts purely as a mechanical stop to set the travel endpoint and does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAIJ125X35-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAIJ125X35-10S Is Used
Press Fit Depth Tuning
Dial in the exact 25-35 mm insertion depth for heavy-duty bearings without swapping physical stop blocks during product changeover.
Machine Commissioning
Fine-tune the retract end-position during initial setup to compensate for mechanical tolerance stack-ups in large assemblies.
Variable End Stops
Adjust the travel endpoint on the fly for short-stroke clamping operations that require precise positional control and 6136 N of force.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-10S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2513 N at 0.5 MPa) is insufficient and you need the higher thrust capacity. The adjustable 25-35 mm travel window is ideal for applications requiring exact end-position tuning during commissioning or product changeover, rather than relying on a fixed-stroke SAI cylinder. Because the 32 mm carbon steel piston rod carries high side-load capacity, it handles robust dynamics well. However, since this is a 35 mm stroke, ensure your external guide handles any lateral forces directly.
To replace an ISO 15552 cylinder, match the 125 mm bore, 35 mm stroke, 10 mm adjustment range, PT tapered port threads, and the -S magnet option. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR configurations. The standard carbon steel rod and PT port threads are factory-configured for this SKU.
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 SAIJ125X35-10S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster allows you to shorten the 35 mm nominal stroke by up to 10 mm, creating a usable travel window of 25-35 mm. This mechanical stop sets the end position but does not lock or hold the load without continuous air pressure.
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