Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 70mm 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
- Stroke70 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 SAIJ50AX70-50
The AirTAC SAIJ50X70-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 70 mm stroke that can be fine-tuned backward by up to 50 mm, yielding a highly flexible 20-70 mm usable travel window. Delivering 982 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and PT tapered port threads.
This adjustable stopper allows precise end-position tuning during commissioning without swapping hardware or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for CMSE or DMSE switches, though this specific SKU is configured without a magnet. Remember the rear adjuster acts strictly as a travel stop, not a load lock.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 70 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 SAIJ50AX70-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×70 | 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 SAIJ50AX70-50 Is Used
Product Changeovers
Dial in the exact 20-70 mm end position for different product sizes on a packaging line without swapping cylinders.
Machine Commissioning
Fine-tune the retract stop during initial setup to perfect tooling alignment, avoiding the need for external shims.
Variable End Stops
Provide adaptable travel limits for clamping or pressing tasks where the material thickness frequently varies.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-50 the Right Cylinder?
Choose this 50 mm bore when your application requires around 982 N push force at 0.5 MPa, stepping up from a 40 mm bore that yields 628 N. An adjustable stroke is ideal for product changeovers requiring variable end stops, rather than maintaining inventory of multiple fixed-stroke SAI cylinders. To replace an ISO 15552 cylinder, match the 50 mm bore, 70 mm stroke, 50 mm adjustment, PT port threads, and mounting set.
The SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the rear adjuster only sets the travel end and does not hold position without live air, use a SAIL or BSAI cylinder if load-holding is required. The 16 mm rod handles standard side loads well, but external guides remain recommended for any unsupported loads.
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 SAIJ50AX70-50 FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. The operational speed range is 30-800 mm/s.
The rear adjuster screw lets you trim the effective travel back by up to 50 mm. This creates a usable stroke window of 20-70 mm, allowing precise end-position tuning without changing the cylinder.
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