Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S
The AirTAC SAIJ125X1000-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 1000 mm travel by up to 20 mm. This creates a usable 980-1000 mm end-position window for fine-tuning at commissioning without adding external stops. It features a carbon steel piston rod and a PT tapered G1/2 port. Because it includes the -S magnet option, it directly supports AirTAC CMSE reed and DMSE solid-state sensors in the dual-side barrel grooves.
Operating at 0.7 MPa, this 125 mm bore generates 8590 N of push force and 5734 N of pull force, placing it firmly in heavy-duty machinery territory. The rear adjuster acts purely as a travel stop and works in tandem with the 40 mm variable air cushions at both ends to decelerate the load. It does not hold the load without live air; for pneumatic locking, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125 Adjustable Cylinder SAIJ125X1000-20S Is Used
Machine Changeover
Dial in the 980-1000 mm travel window during product family changeovers to hit new end positions without physically swapping the cylinder.
Heavy Press Positioning
Leverage the 8590 N push force at 0.7 MPa for heavy pressing operations while using the rear stopper to fine-tune the final approach depth.
Long-Stroke Conveying
Use the 1000 mm travel for extended indexing or material handling, relying on the 40 mm air cushions to safely decelerate the load.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S the Right Cylinder?
Choose this adjustable-stroke variant over a fixed SAI when a machine setup requires variable end-stops or product-size changeovers that would otherwise demand a physical cylinder swap. If your application requires less force, stepping down to an 80 mm bore yields 3518 N at 0.7 MPa; if you need more push, a 160 mm bore provides 14074 N.
When matching the ISO 15552 replacement, verify the 125 mm bore, 1000 mm stroke, 20 mm adjustment, G1/2 PT ports, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is 1000 mm, the 32 mm rod is highly susceptible to side-loading; an external guide rail is strongly recommended to prevent rod binding and premature seal wear.
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 SAIJ125 Adjustable Cylinder SAIJ125X1000-20S FAQ
At 0.7 MPa, this 125 mm bore cylinder provides 8590 N of push force and 5734 N of pull force. The operating speed range is 30-500 mm/s.
A rear adjusting screw lets you shorten the effective travel by up to 20 mm, creating a 980-1000 mm usable window. This stopper sets the travel end but does not lock the load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.