Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75
The AirTAC SAIJ125X105-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of pull force at 0.5 MPa and provides a usable travel window of 30-105mm, allowing you to dial back the 105mm nominal stroke by up to 75mm during commissioning without adding external stops.
It features a 32mm carbon steel rod and an M27x2 thread, which handles substantial side loads, though long unsupported strokes still require an external guide. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125X105-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125X105-75 Is Used
Product Changeovers
Quickly modify the retract end-stop within the 30-105mm window when running a new package size, eliminating the need to physically swap cylinders on the machine.
Clamp Position Tuning
Micro-adjust the final clamping position during commissioning to accommodate varying workpiece thicknesses without re-engineering the fixture.
Assembly Machine Setup
Dial in the exact end-of-stroke position for a heavy press operation, using the 6136N pull force to securely seat components before fastening.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-75 the Right Cylinder?
Choose this 125mm bore when an 80mm bore (2268N pull at 0.5MPa) is insufficient, but a 160mm bore (9425N pull at 0.5MPa) is physically oversized. The 75mm adjustment window is ideal for product-size changeovers on a line, letting you fine-tune the retract end-position on the fly instead of swapping a fixed-stroke SAI cylinder.
For setup, specify the PT tapered port, your required mounting bracket, and note that no magnet is specified. Because the stroke is 105mm, no external guide is strictly required, but remember the rear adjuster is a travel stop, not a lock. It will not hold a load without live air; for true pneumatic locking, use an SAIL or BSAI cylinder.
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 SAIJ125X105-75 FAQ
At 0.5 MPa it provides 6136N pull force and 8590N push force. At 0.9 MPa, the push force increases to 11045N.
The rear adjuster acts as a stopper that lets you shorten the 105mm nominal stroke by up to 75mm, creating a usable travel window of 30-105mm. It sets the end position but does not lock the load without live air pressure.
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