Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40 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 SAIJ50AX400-40
The AirTAC SAIJ50X400-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 360-400 mm usable travel window, letting you trim the 400 mm nominal stroke by up to 40 mm during commissioning. This bore delivers 982 N of push force and 825 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible positioning.
This variant uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The rear adjuster functions strictly as a travel stop to fine-tune the retract end position without adding external stops. It does not hold the load without live air pressure; for position holding, consider the SAIL or BSAI series.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40 |
|---|---|
| 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 SAIJ50AX400-40
| 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 SAIJ50AX400-40 Is Used
Machine Changeover
Dial in the 360-400 mm travel window during product size changes without swapping the cylinder or bolting on external stops.
Variable End Stops
Set precise retract positions on packaging lines where the rear stopper fine-tunes the end of stroke on the fly.
Assembly Station Setup
Trim the effective stroke by up to 40 mm during commissioning to perfect the seating force of 982 N on varied fixtures.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40 the Right Cylinder?
Choose this 50 mm bore model when you need 982 N of thrust at 0.5 MPa and require variable end-stop positioning. If your application needs less force, the 40 mm bore offers 628 N; if you need more, the 63 mm bore provides 1559 N. The adjustable stroke is ideal for machine setups requiring product changeovers, whereas a fixed SAI cylinder is better for dedicated, unchanging strokes.
Because the 400 mm stroke is long, the 20 mm rod diameter and M16x1.5 rod thread will carry side loads better than smaller bores, but an external guide is still recommended for unsupported loads. This cylinder uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It is dimensionally interchangeable per ISO 15552.
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 SAIJ50AX400-40 FAQ
The rear adjusting screw acts as a stopper that lets you shorten the 400 mm nominal stroke by up to 40 mm, providing a usable travel window of 360-400 mm. It only sets the travel end and does not lock or hold the load without live air pressure.
At 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. It can reach up to 1767 N of push force at 0.9 MPa.
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 SAIJ50AX400-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.