Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S
The AirTAC SAIJ125X110-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N of pull force at 0.5 MPa and provides a usable travel window of 60-110mm, letting you trim up to 50mm from the 110mm nominal stroke. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This SAIJ variant ships with a standard carbon steel rod and a magnetic piston (-S) for position sensing with AirTAC CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position without adding external stops, while the shared PT tapered port threads ensure a tight pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAIJ125X110-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SAIJ125X110-50S Is Used
Press Fit Tuning
Dial in the exact 60-110mm insertion depth for a press-fit assembly during setup, allowing rapid changes for different product variants without swapping cylinders.
Machine Changeover
Adjust the retract stop on the fly during product size changeovers on a packaging line, using the 50mm trim window to adapt to new container heights.
Clamp Positioning
Fine-tune the clamping end-position on a heavy-duty welding fixture, leveraging the 6136N pull force to secure parts while adjusting for material thickness variations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-50S the Right Cylinder?
Choose this 125mm bore cylinder when an application requires high force combined with variable end-position tuning, such as dialing in a press or clamp during machine commissioning. If you need less force, stepping down to a 100mm bore yields 3681N pull at 0.5 MPa; stepping up to 160mm provides 9425N. Remember that the rear adjuster is a travel stop, not a lock, so it will not hold the load without live air. For fail-safe load holding, consider the SAIL or BSAI series instead.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 125mm bore, 110mm stroke, 50mm adjustment range, PT port threads, and the -S magnet option. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Since the stroke is under 300mm, side-load stress is minimal, but an external guide is still recommended for heavy offset loads.
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 SAIJ125X110-50S FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of pull force and 8590N of push force. The maximum push force reaches 11045N at 0.7 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 110mm nominal stroke by up to 50mm, creating a usable travel window of 60-110mm. It sets the end position but does not lock the load without live air.
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