This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ100X400-20S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac SUJ Adjustable Cylinder SUJ100X400-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ100X400-20S is a double-acting profile-type standard cylinder with a Ø100mm bore and 400mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ100X400-20S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAUJ100X400-20S
- 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 SUJ Adjustable Cylinder SUJ100X400-20S
The AirTAC SUJ100X400-20S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 380-400 mm extension out of the 400 mm nominal maximum. It features a 100 mm bore, a 25 mm piston rod, M20x1.5 rod-end thread, 29 mm adjustable air cushions, and a 1/2 inch port.
Because the SUJ series is end-of-life, the direct replacement is the SAUJ100X400-20S, which preserves the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade transitions from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ100X400-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ100X400-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ100X400-20S |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ100X400-20S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAUJ100X400-20S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ100X400-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac SUJ Adjustable Cylinder SUJ100X400-20S Is Used
Press Fit Tuning
Achieve exact insertion depths on bearing presses by dialing in the final 20 mm of the extend stroke on-site, avoiding hard mechanical stops.
Variable Length Diverter
Adjust the extend stroke from 380 to 400 mm to reposition package diverters on the fly without changing out the entire cylinder body.
Pallet Stop Positioning
Fine-tune the end position of pallet stops in handling lines to accommodate varying load dimensions using the integrated stop screw.
Replacing the Airtac SUJ Adjustable Cylinder SUJ100X400-20S with the SAUJ100X400-20S
To replace this discontinued SUJ100X400-20S, order the direct replacement SAUJ100X400-20S, matching the 100 mm bore, 400 mm stroke, 20 mm adjust window, and 1/2 inch port. Choose the 20 mm adjust window when you need precise 380-400 mm extend tuning on-site; a fixed SAU plus external stop lacks this integrated profile. Mounting uses FA or LB brackets (SC-series compatible). Because this has a -S magnet, swap legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUJ. For this 400 mm stroke, use external guides to prevent rod bending and manage side loads. The stop screw sets end position and is not a lock; add an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ100X400-20S
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac SUJ Adjustable Cylinder SUJ100X400-20S FAQ
Yes, the SUJ100X400-20S is discontinued. The direct replacement is the SAUJ100X400-20S, which matches the 100 mm bore, 400 mm stroke, 20 mm adjust window, 1/2 inch port, and FA/LB mounting. You will need to upgrade the piston magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The 20 mm adjust window allows trimming the 400 mm extend stroke down to 380 mm on-site. The 1/2 inch port and 29 mm cushions handle speeds of 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ100X400-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ100X400-20S replacement — usually within 7-8 hours.