Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40
The AirTAC SAIJ125X200-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and provides a usable travel window of 160-200mm, letting you trim up to 40mm off the nominal stroke during machine setup. A SUS420J2 stainless steel rod (code A) provides enhanced corrosion resistance for harsher industrial environments.
This extruded aluminum profile cylinder includes variable air cushions at both ends and operates at speeds of 30-500mm/s. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position without adding external stops. It supports AirTAC CMSE reed and DMSE electronic sensors via dual-side barrel grooves when a magnet is specified, and uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125AX200-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SAIJ125AX200-40 Is Used
Precision End-Stop Tuning
Dial in the exact retract position within the 160-200mm window during machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adjust the stroke by up to 40mm to accommodate varying product sizes on a single production line, minimizing downtime.
Fixture Setup
Use the rear mechanical stop to set precise clamping depths in automated fixtures, relying on the 6136N thrust for secure holding.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-40 the Right Cylinder?
Select this 125mm bore when 6136N of push force at 0.5MPa is required, stepping up from an 80mm bore that yields 2513N. Choose the adjustable-stroke SAIJ over a fixed SAI cylinder when your application requires variable product sizes or end-position tuning during commissioning. Remember the rear adjuster only sets the travel end; it does not hold the load without live air. For true load-holding without pressure, use an external rod lock or explore the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 125mm bore, 200mm stroke, 40mm adjustment, PT tapered port thread, and your required mounting. Since the 200mm stroke is below the 300mm threshold, side-load concerns are minimal, but always ensure the M27x2 rod thread is properly aligned to prevent binding.
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 SAIJ125AX200-40 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
The rear adjuster acts as a mechanical stop that shortens the effective stroke. For this 200mm nominal stroke model, you can trim the travel back by up to 40mm, creating a usable 160-200mm window to fine-tune the end position without external stops.
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