Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 650mm 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
- Stroke650 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 SAIJ50BX650-75S
The AirTAC SAIJ50X650-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This yields a usable stroke window of 575 to 650 mm, enabling precise end-position tuning at commissioning without swapping out the cylinder or bolting on external stops. It delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and is equipped with a magnet for CMSE reed and DMSE electronic sensors. It uses PT tapered port threads (G1/4) and relies on the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 650 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 SAIJ50BX650-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×650 | 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 SAIJ50BX650-75S Is Used
Machine Changeover
Dial in the exact end-stop during product-size changeovers on a packaging line, utilizing the 575 to 650 mm travel window to accommodate varying package lengths without hardware swaps.
Assembly Calibration
Fine-tune the retract end position during machine commissioning to perfect part pressing or seating, using the rear stopper to dial out mechanical gaps without re-mounting the actuator.
Variable Diverting
Adjust the stroke on the fly for a conveyor diverting mechanism that must handle different box sizes, setting the exact push distance required for each product profile.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-75S the Right Cylinder?
Choose this 50 mm bore when you need 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). An adjustable stroke is highly beneficial for machine setups requiring variable end stops or product-size changeovers, offering more flexibility than a fixed-stroke SAI cylinder. Because the stroke is 650 mm, an external guide is strongly recommended to prevent excessive side loads on the 20 mm rod and M16x1.5 rod thread.
For ISO 15552 replacement matching, verify the 50 mm bore, 650 mm nominal stroke, 75 mm adjustment range, PT G1/4 ports, and the -S magnet option. If your application requires true load holding without live air pressure, this cylinder will not suffice; consider the SAIL (air-released lock) or BSAI (clamp-lock) series 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 SAIJ50BX650-75S FAQ
At an operating pressure of 0.5 MPa, this 50 mm bore cylinder provides a push (extend) force of 982 N and a pull (retract) force of 825 N. It can deliver up to 1374 N of push force at 0.7 MPa.
The rear external screw acts as a mechanical stopper that lets you shorten the nominal 650 mm stroke by up to 75 mm, creating a usable travel window of 575 to 650 mm. It functions as a travel stop and does not lock or hold the load without continuous air pressure.
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