Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-40 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 SAIJ50BX350-40
The AirTAC SAIJ50X350-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 310 mm from its 350 mm nominal length. Delivering 982 N of push thrust at 0.5 MPa, it provides robust linear motion while utilizing a SUS304 stainless steel rod for superior corrosion resistance in harsh environments.
Equipped with PT tapered port threads and a 20 mm rod diameter, this unit is designed for variable air cushioning at both ends to manage deceleration. The extruded aluminum barrel includes sensor grooves on both sides, allowing for flexible mounting of electronic DMSE or reed CMSE switches if position feedback is later required.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-40 |
|---|---|
| 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 SAIJ50BX350-40
| 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 SAIJ50BX350-40 Is Used
Product Changeovers
Dial in new end positions rapidly during format size changes on a packaging line without disassembling the machine.
Stroke Fine-Tuning
Trim the 350 mm travel back by up to 40 mm to perfect the seating force of a pressing operation at commissioning.
Variable End Stops
Adjust the retract distance on the fly to handle varying package lengths moving down a conveyor system.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX350-40 the Right Cylinder?
Choose this 50 mm bore when 40 mm bore cylinders (offering 628 N at 0.5 MPa) lack the necessary force, but stepping up to a 63 mm bore (1559 N) would be oversized. The 40 mm adjustment range is ideal for product changeovers on a packaging line, letting operators dial in the exact end position without swapping out the cylinder or adding external mechanical stops.
Because the stroke is 350 mm, the extended 20 mm rod is susceptible to deflection under high side loads; an external guide rail should be used to prevent binding. When specifying an ISO 15552 replacement, match the 50 mm bore, 350 mm stroke, 40 mm adjuster, PT G1/4 ports, and the standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe holding, consider the SAIL or BSAI series.
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 SAIJ50BX350-40 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push thrust and 825 N of pull thrust. It can deliver up to 1374 N of push force at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke. For this SAIJ50X350-40, it creates a usable travel window between 310 mm and 350 mm, allowing you to trim the end position without altering the cylinder mounting.
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