Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S
The AirTAC SAIJ125X185-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear mechanical adjuster. It provides a nominal stroke of 185 mm that can be fine-tuned down by up to 30 mm, yielding a precise usable travel window of 155-185 mm. Delivering 6136 N of push force at 0.5 MPa, this bore size handles heavy loads while operating at 30-500 mm/s.
This variant includes a magnet (-S) for position sensing with CMSE reed or DMSE electronic switches fitted into the dual sensor grooves on the extruded aluminum barrel. It features a robust 32 mm carbon steel piston rod with an M27x2 thread, and uses PT tapered port threads (G1/2). The rear stopper sets the end position but does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SAIJ125X185-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SAIJ125X185-30S Is Used
Heavy Press Tuning
Dial in the exact 155-185 mm end-stop during heavy press setup to accommodate material thickness variations without swapping tooling.
Product Changeover
Adjust the retract position on packaging lines when switching to different package sizes, using the 30 mm trim to avoid recalibrating fixed stops.
Machine Setup
Fine-tune the stroke end-point during initial commissioning to perfectly time heavy material handling operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S the Right Cylinder?
Select this 125 mm bore when an application requires substantial thrust—stepping up from a 100 mm bore increases push force from 3927 N to 6136 N at 0.5 MPa. Choose the SAIJ adjustable-stroke design over a fixed SAI cylinder when you need to trim the retract end-position during commissioning or product changeover without adding external stops. To replace an ISO 15552 cylinder, match the 125 mm bore, 185 mm stroke, 30 mm adjustment, PT G1/2 port, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 185 mm, ensure external guiding if the load is heavy or subject to side loads. For load-holding without live air, use a SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ125X185-30S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a stopper that allows you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 155-185 mm from the 185 mm nominal stroke, enabling fine-tuning at commissioning without changing the cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.