Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 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 SAIJ50AX400-75S
The AirTAC SAIJ50X400-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of pull force at 0.5 MPa and features a 400mm nominal stroke that can be fine-tuned down by up to 75mm, creating a precise 325-400mm usable travel window. This adjustability allows you to dial in exact end positions at commissioning without swapping out the entire cylinder.
Built with an SUS420J2 stainless steel rod (code A) and PT tapered ports, this extruded aluminum profile cylinder includes a magnet (-S) for position sensing. The integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic switches fitted into the dual sensor grooves. The rear stopper screw sets the retract end position, but remember it acts as a travel stop, not a lock; the cylinder cannot hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 SAIJ50AX400-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SAIJ50AX400-75S Is Used
Product Changeover
Quickly adapt the retract end position for different product sizes on a packaging line using the 325-400mm travel window.
Machine Setup
Fine-tune the exact end-stop during commissioning without machining external stopper blocks or changing the cylinder.
Variable End Stops
Adjust the stroke dynamically on a conveyor sorting diverter to handle varying package dimensions on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S the Right Cylinder?
Choose this 50mm bore when you need 982N pull force at 0.5 MPa, stepping up from a 40mm bore (528N pull) or down from a 63mm bore (1402N pull). An adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 50mm bore, 400mm stroke, 75mm adjustment, PT ports, and the -S magnet.
Because the 400mm stroke is relatively long, the 20mm rod diameter and M16x1.5 rod thread will carry moderate side loads, but an external guide is recommended for unsupported loads to prevent premature wear. If your application requires true load-holding without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ50AX400-75S FAQ
The rear adjuster acts as a mechanical stop that trims the effective stroke. For this model, the 400mm nominal stroke can be reduced by up to 75mm, giving a usable travel window of 325-400mm. Note that this adjuster is a stop, not a lock, and cannot hold a load without live air.
At 0.5 MPa operating pressure, the SAIJ50X400-75-S provides 982N of push force and 825N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.