Airtac SAIJ50 Adjustable Cylinder SAIJ50BX850-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX850-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 850mm 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
- Stroke850 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 SAIJ50BX850-75S
The AirTAC SAIJ50X850-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 775-850 mm window. Delivering 982 N of push force at 0.5 MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a robust pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet enables precise position detection using AirTAC CMSE reed or DMSE electronic switches.
Because the nominal 850 mm stroke exceeds typical standard ranges, this specific configuration provides extended travel while retaining the adjustable end-stop functionality. The rear adjustment mechanism acts solely as a travel stop to set the retract position, meaning it does not hold the load without live air pressure. For applications requiring true load-holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX850-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX850-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 850 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 SAIJ50BX850-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×850 | 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 SAIJ50BX850-75S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 775-850 mm window during machine setup, eliminating the need to physically swap cylinders or bolt on external mechanical stops.
Product Changeover Lines
Quickly adjust the travel distance on packaging or sorting conveyors to accommodate varying product sizes without changing the entire pneumatic setup.
Extended Travel Positioning
Utilize the long 850 mm stroke for pushing or lifting tasks, relying on the rear stopper to precisely set the final end-position for repeated manufacturing accuracy.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX850-75S the Right Cylinder?
Choose this 50 mm bore cylinder when your application requires 982 N of thrust at 0.5 MPa and a variable end-stop for product changeovers, stepping down from a 63 mm bore (1559 N) if you need less force, or up from a 40 mm bore (628 N) for higher capacity. The 75 mm adjustment range is ideal for dialing in exact end positions during commissioning without adding external stops.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 850 mm stroke, 75 mm adjustment, PT port thread, and the -S magnet option. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Given the 850 mm stroke, the 20 mm rod diameter and M16x1.5 rod thread can only handle limited side loads, so an external guide rail is strongly recommended to prevent rod binding.
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 SAIJ50BX850-75S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 1767 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm from the 850 mm nominal length, providing a usable travel window of 775 to 850 mm for fine-tuning the end position.
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 SAIJ50BX850-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.