Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 135mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10
The AirTAC SAIJ50X135-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. It provides a usable travel window of 125-135 mm, letting you dial back the nominal 135 mm stroke by up to 10 mm during commissioning. Delivering 982 N of push thrust at 0.5 MPa, it fits mid-range force applications perfectly.
This variant uses a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, ready for CMSE reed or DMSE electronic sensors if a magnet is added later. The rear adjuster acts purely as a mechanical stop for deceleration, meaning it will not hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 135 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×135 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX135-10 Is Used
Machine Setup Calibration
Dial in the exact 125-135 mm end-stop during initial commissioning without fabricating external spacers or changing the cylinder.
Product Changeover
Quickly adjust the travel end position on a packaging line when switching to a slightly different carton size.
End-Position Trimming
Compensate for mechanical wear or slight variations in upstream feeding by fine-tuning the retract stroke by up to 10 mm.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX135-10 the Right Cylinder?
Choose this 50 mm bore when your application requires around 982 N of push force at 0.5 MPa; stepping down to a 40 mm bore drops the push force to 628 N, while an 80 mm bore increases it to 2513 N. An adjustable stroke is highly beneficial when you need precise end-position tuning at machine setup or during product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder.
Because this is a standard 135 mm stroke, side-load concerns are minimal, but always ensure the M16x1.5 rod thread is aligned with your load. For load-holding without continuous air pressure, this cylinder is insufficient—the rear stopper is not a lock—so you should pivot to an SAIL air-released lock or BSAI clamp-lock cylinder. To replace an ISO 15552 cylinder, match the 50 mm bore, 135 mm stroke, 10 mm adjustment, PT G1/4 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ50 Adjustable Cylinder SAIJ50BX135-10 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push thrust and 825 N of pull thrust. At the maximum 1.0 MPa, it delivers up to 200 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 135 mm down to 125 mm. This creates a 10 mm adjustable window for fine-tuning the end position at commissioning without replacing the cylinder.
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