Airtac SAIJ50 Adjustable Cylinder SAIJ50BX85-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX85-30 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 SAIJ50BX85-30
The AirTAC SAIJ50X85-30 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 85 mm stroke that can be fine-tuned down by up to 30 mm, creating a usable travel window of 55-85 mm for precise end-position calibration. Delivering 982 N of push force at 0.5 MPa, it fits perfectly into mid-range pneumatic setups.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches if position feedback is needed later. It supports a standard speed range of 30-800 mm/s and uses adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX85-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX85-30 |
|---|---|
| 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 SAIJ50BX85-30
| 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 SAIJ50BX85-30 Is Used
Product Changeovers
Quickly adapt end-stops on a packaging line when switching container sizes, utilizing the 55-85 mm travel window to avoid physically replacing the cylinder.
Fixture Calibration
Fine-tune the clamping position during machine commissioning, using the rear screw to dial in the exact endpoint without adding external stopper blocks.
Assembly Stations
Drive mid-force pressing operations where the 982 N thrust at 0.5 MPa is sufficient, relying on the SUS304 rod for durability in mildly corrosive environments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX85-30 the Right Cylinder?
Choose this 50 mm bore when an application requires around 982 N of push force at 0.5 MPa. If your setup demands less force, stepping down to a 40 mm bore yields 628 N; if you need more clamping power, a 63 mm bore provides 1559 N. The adjustable stroke is ideal for machine changeovers, letting you dial in the exact 55-85 mm travel without swapping hardware. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the stroke is 85 mm, side-load risks are minimal, but always ensure the load is guided to prevent rod binding. Remember that the rear adjuster acts only as a mechanical stop to set the travel end; it does not hold the load without continuous air pressure. For load-holding requirements without live air, consider an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ50BX85-30 FAQ
The rear adjuster screw allows you to shorten the effective travel by up to 30 mm. This creates a usable stroke window of 55 to 85 mm, letting you set the exact retract position at commissioning without changing the cylinder.
At a 0.5 MPa operating pressure, the SAIJ50X85-30 generates 982 N of push force and 825 N of pull force. If operated at 0.7 MPa, the push force increases to 1374 N.
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