Airtac SAIJ50 Adjustable Cylinder SAIJ50BX50-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX50-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 50mm 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
- Stroke50 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 SAIJ50BX50-20S
The AirTAC SAIJ50X50-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 982N of push force at 0.5MPa, with a nominal 50mm stroke that can be fine-tuned down by up to 20mm. This yields a usable travel window of 30-50mm, allowing precise end-position calibration during commissioning without swapping hardware.
Equipped with a SUS304 stainless steel rod and a PT tapered port, this unit includes a magnet (-S) for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel provides sensor grooves on both sides. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX50-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX50-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAIJ50BX50-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SAIJ50BX50-20S Is Used
Product Changeover
Dial in the 30-50mm travel window during format size changes on a packaging line without adding external stops.
End-Position Tuning
Fine-tune the exact retracted position of a clamping fixture at commissioning using the rear adjustment screw.
Variable End Stops
Accommodate multiple part lengths on a single machining station by adjusting the stroke back by up to 20mm.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX50-20S the Right Cylinder?
Select this 50mm bore when an application requires moderate thrust and variable end-stops; if you need less force, the 40mm bore offers 628N at 0.5MPa. The adjustable stroke is ideal for product changeovers, but note the rear screw is a travel stop, not a lock. For load-holding without live air, use a SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify: 50mm bore, 50mm stroke, 20mm adjustment, PT port, and the -S magnet.
The 16mm rod and M16x1.5 thread handle side loads well, but always support long unsupported strokes with an external guide. The variable air cushions at both ends decelerate the load, while the adjuster sets the final resting position.
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 SAIJ50BX50-20S FAQ
At 0.5MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7MPa, the push force increases to 1374N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 50mm nominal stroke by up to 20mm. This creates a 30-50mm usable travel window for fine-tuning the end position without replacing the cylinder.
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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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Most inquiries answered within 7-8 hours.
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