Airtac SAIJ50 Adjustable Cylinder SAIJ50AX85-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX85-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 85mm 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
- Stroke85 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 SAIJ50AX85-50S
The AirTAC SAIJ50X85-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 35-85 mm window. It delivers 982 N of push thrust at 0.5 MPa, making it well-suited for moderate-force positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this variant is equipped with a magnet for CMSE reed and DMSE electronic switches.
This model uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The rear adjustment mechanism acts purely as a travel stop to dial in end positions during commissioning; it does not function as a lock and will not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX85-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX85-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 85 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 SAIJ50AX85-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×85 | 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 SAIJ50AX85-50S Is Used
Variable End-Stop Tuning
Dial in the exact 35-85 mm travel window during machine commissioning to accommodate varying product lengths without swapping cylinders.
Product Size Changeover
Rapidly adjust the retract end-position on packaging lines handling different carton sizes, ensuring precise spacing on the fly.
Assembly Positioning
Fine-tune the stroke limit on a 982 N thrust assembly press to guarantee components are seated to the exact required depth.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX85-50S the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI when you need to dial in exact end-of-stroke positions during machine setup or product changeovers without adding external stops. If your application requires less force, stepping down to a 40 mm bore yields 628 N of push thrust at 0.5 MPa; if you need more power, stepping up to a 63 mm bore provides 1559 N. To match this exact ISO 15552 replacement, specify a 50 mm bore, 85 mm stroke, 50 mm adjustment, PT ports, SUS420J2 rod, and a magnet (-S). Because the 16 mm rod and M12x1.25 thread handle side loads well, it integrates reliably into standard mounting setups using Basic, FA, LB, TC, FTC, TCM1, or TCM2 brackets.
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 SAIJ50AX85-50S 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 pressure, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 85 mm stroke by up to 50 mm, creating a usable travel window of 35-85 mm. It only sets the end position and does not lock the load without live air pressure.
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