Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 350mm 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
- Stroke350 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 SAIJ50BX350-20S
The AirTAC SAIJ50X350-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 330 to 350 mm. Delivering 982 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod and includes a magnet for position sensing. An external screw at the rear acts strictly as a travel stop to fine-tune the retract end position, meaning it does not hold the load without live air pressure.
This extruded aluminum profile cylinder features sensor grooves on both sides for flexible switch mounting and operates at speeds of 30-800 mm/s. It utilizes a PT G1/4 port and offers variable air cushions at both ends to manage deceleration. The mounting hardware supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 configurations, deliberately omitting FB, CA, CB, and CR options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 350 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 SAIJ50BX350-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SAIJ50BX350-20S Is Used
Product Changeovers
Dial in the 330-350 mm travel window during format size changes on a packaging line without physically swapping the actuator.
Machine Setup
Fine-tune the retract end-stop during initial commissioning to perfectly align tooling without machining custom spacers.
Variable End Stops
Adjust the rear stopper screw on the fly to accommodate multiple part lengths fed through the same workstation.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-20S the Right Cylinder?
Choose this 50 mm bore when you need 982 N push force at 0.5 MPa, stepping up from a 40 mm bore that provides 628 N, or down from a 63 mm bore yielding 1559 N. The adjustable stroke is ideal for machine setup and product changeovers, allowing you to dial in the exact end-stop without swapping cylinders or adding external stops. For load-holding without continuous air pressure, you must integrate an external rod lock or pilot-operated check valve, or select a SAIL or BSAI series cylinder instead.
Because this model features a 350 mm stroke, the 20 mm rod diameter and M16x1.5 thread will still experience leverage forces if the load is unsupported. An external guide rail is recommended to prevent side-loading damage. For exact ISO 15552 replacement matching, verify the 50 mm bore, 350 mm stroke, 20 mm adjustment, PT G1/4 port, and the -S magnet requirement.
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 SAIJ50BX350-20S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 350 mm down to 330 mm. This stopper only sets the end position and does not lock the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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