Airtac SAIJ50 Adjustable Cylinder SAIJ50BX45-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX45-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 45mm 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
- Stroke45 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 SAIJ50BX45-30
The AirTAC SAIJ50X45-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 15-45mm usable travel window from its 45mm nominal stroke. It delivers 982N of push force and 825N of pull force at 0.5 MPa, making it a solid mid-range choice for precise end-position tuning. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed and DMSE electronic sensors.
This specific SKU utilizes a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads. The rear adjustment screw functions as a mechanical stop to dial in the retract position during commissioning without adding external stops. It is important to note that this adjuster is not a lock; the cylinder cannot hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX45-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX45-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 45 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 SAIJ50BX45-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×45 | 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 SAIJ50BX45-30 Is Used
Product Changeover
Dial in the 15-45mm travel window on the fly during packaging line format changes without swapping out the entire cylinder.
End-Stop Calibration
Fine-tune the retract position during machine commissioning using the rear screw, ensuring exact positioning without external stopper blocks.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for pushing and clamping tasks in environments where moisture or washdowns would degrade standard carbon steel.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX45-30 the Right Cylinder?
Choose this 50mm bore when your application requires roughly 982N of push force at 0.5 MPa, stepping up from the 40mm bore (628N push) for heavier loads, or down from the 63mm bore (1559N push) to save space. The adjustable stroke is ideal for machine setups requiring variable end-stops or product changeovers, providing fine-tuning that a fixed-stroke SAI cylinder cannot offer. If your process demands load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster only sets the travel end.
For ISO 15552 replacement matching, verify the 50mm bore, 45mm stroke, 30mm adjustment range, PT G1/4 port, and standard mounting options (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this configuration omits the FB, CA, CB, and CR mounts. The 20mm rod diameter and M16x1.5 thread handle side loads well, though any long unsupported stroke still requires an external guide.
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 SAIJ50BX45-30 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 30mm, creating a 15-45mm usable travel window. It allows precise end-position tuning at commissioning without changing the cylinder.
At 0.5 MPa, this 50mm bore cylinder provides 982N of push force and 825N of pull force. It can reach up to 1767N of push force at 0.9 MPa.
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