Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S
The AirTAC SAIJ125X500-30-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, delivering 6136N of push force at 0.5 MPa. It features a 500mm nominal stroke equipped with a rear-mounted adjusting screw, providing a 470-500mm usable travel window. This built-in adjustability allows you to fine-tune the retract end-position during commissioning or product changeovers without adding external stops or swapping the cylinder.
This model includes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered ports. The extruded aluminum barrel features sensor grooves on both sides, and the -S magnet option enables position detection with AirTAC CMSE reed or DMSE electronic solid-state switches. It supports a speed range of 30-500 mm/s and relies on variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125AX500-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125AX500-30S Is Used
Machine Changeover
Dial in the 470-500mm retract position precisely when switching between product sizes on the same production line.
Variable End-Stop Tuning
Use the 30mm rear screw to fine-tune the final end-position during commissioning without installing bulky external mechanical stops.
Heavy-Duty Positioning
Leverage the 6136N push force to move heavy pallets or fixtures, relying on the built-in air cushion to decelerate the 500mm travel safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-30S the Right Cylinder?
Selecting this 125mm bore cylinder is ideal when your application requires the 6136N push force at 0.5 MPa and on-the-fly stroke trimming. If your setup needs less force, stepping down to an 80mm bore yields 2513N push force. The 30mm adjustment range is perfect for dialing in exact end-stops during machine setup, whereas a fixed-stroke SAI cylinder locks you into a single 500mm dimension. When matching an ISO 15552 replacement, verify the 500mm stroke, 30mm adjustment, PT G1/2 port, and the -S magnet requirement.
Because the nominal stroke is 500mm, it is critical to use an external guide to prevent excessive side-loading on the 32mm rod. Remember that the rear adjuster and air cushions act only as travel stops for deceleration; they do not hold the load without live air pressure. For true load-holding without continuous pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ125AX500-30S FAQ
At an operating pressure of 0.5 MPa, this 125mm bore double-acting cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 30mm, creating a usable travel window of 470-500mm. The adjuster acts as a mechanical stop for the retract end-position and does not lock the load without continuous air pressure.
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 SAIJ125AX500-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.