Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S
The AirTAC SAIJ125X130-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 130 mm travel by up to 40 mm. This creates a usable end-position window of 90 to 130 mm, perfect for fine-tuning retract distances during machine commissioning or product changeovers without swapping hardware. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the rear stopper acts purely as a travel limit, not a load lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125AX130-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125AX130-40S Is Used
Product Changeover
Quickly shift the retract end-position from 130 mm down to 90 mm when adapting the line to a new package size, avoiding the need to physically swap cylinders.
Machine Setup
Dial in the exact end-stop during initial commissioning to perfect a forming or pressing operation, using the 40 mm adjustment range to find the optimal travel.
Variable End Stops
Provide flexible positioning for heavy-duty actuators requiring up to 6136 N of push force, relying on the rear screw to set the precise deceleration point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-40S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (delivering 3927 N push at 0.5 MPa) lacks thrust, but you want to avoid the 160 mm class. The adjustable 90 to 130 mm travel window is ideal for setups requiring variable end-stops, whereas a fixed SAI cylinder locks you into one exact dimension. Because the stroke is 130 mm, side-load is manageable, but always ensure the M27x2 rod thread is aligned with your external guide to prevent binding.
To replace an ISO 15552 cylinder, match the 125 mm bore, 130 mm nominal stroke, 40 mm adjuster, PT tapered port thread, and the -S magnet. Note that SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. If you need to hold a load without live air pressure, select a SAIL lock or BSAI clamp-lock cylinder instead, as the rear adjuster here is only a stop.
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 SAIJ125AX130-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm from the 130 mm nominal length, creating a usable travel window of 90 to 130 mm. It acts as a mechanical stop and does not lock the load without air pressure.
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