This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X400-100, 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 SUJ50X400-100
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X400-100 is a double-acting profile-type standard cylinder with a Ø50mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X400-100, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X400-100
- 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 SUJ50X400-100
The AirTAC SUJ50X400-100 is a double-acting double-rod profile cylinder with a 50mm bore and 400mm maximum stroke. An external stop screw lets you trim the extend stroke on-site by up to 100mm, yielding a usable 300-400mm window. This SKU has no magnet and cannot take a sensor.
This SUJ model is discontinued; the direct replacement is the SAUJ50X400-100, matching the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches. Note that the stop screw sets end position only—it is not a load lock.
Airtac SUJ Adjustable Cylinder SUJ50X400-100 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X400-100 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X400-100 |
| Bore size | Ø50 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| 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, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ50X400-100 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAUJ50X400-100 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 SUJ50X400-100
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | 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 SUJ50X400-100 Is Used
Variable Pitch Indexing
Allows on-site extend stroke tuning from 300 to 400mm to alter part pitch without swapping cylinders when material widths change.
Adjustable Diverter Gate
Sets the exact push distance for routing different carton sizes on a line, using the 100mm stop screw to accommodate varied box depths.
Variable Depth Pusher
Trims the extend stroke to push loads to distinct conveyor lanes, dialing in the exact end position without reprogramming controls.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X400-100 with the SAUJ50X400-100
To replace the discontinued SUJ50X400-100, use the direct replacement SAUJ50X400-100, which preserves the 50mm bore, 400mm nominal stroke, 100mm adjust window, 1/4" port, and FA/LB mounting. Choose the 100mm adjust window if you need to trim the extend stroke on-site down to 300mm. Because this SKU lacks a magnet, it cannot accept sensors; if sensing is required, select an SAUJ with the -S suffix and use CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. At 400mm stroke, minimize side-load and rod-bending by using external guides to support the piston rod.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X400-100
- ✓ 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 SUJ50X400-100 FAQ
Yes, the SUJ50X400-100 is discontinued. The direct replacement is the SAUJ50X400-100, which matches the 50mm bore, 400mm stroke, 100mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw window is 100mm, allowing you to trim the 400mm extend stroke down to 300mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X400-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X400-100 replacement — usually within 7-8 hours.