This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ80X50-20, 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 SUJ80X50-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ80X50-20 is a double-acting profile-type standard cylinder with a Ø80mm bore and 50mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ80X50-20, which matches its bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAUJ80X50-20
- 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 SUJ80X50-20
The AirTAC SUJ80X50-20 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 30-50 mm extend out of the 50 mm nominal maximum. This specific SKU has no magnet, so it cannot accept a magnetic switch. The 3/8" port, M20x1.5 rod thread, and 28 mm adjustable cushions match the standard 80 mm specification.
This SUJ model is discontinued and the direct replacement is the SAUJ80X50-20, which preserves the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches this series required. Note that the stop screw sets the end position but is not a load lock; use an external rod lock to hold loads on air loss.
Airtac SUJ Adjustable Cylinder SUJ80X50-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ80X50-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ80X50-20 |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| 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, 28 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ80X50-20 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAUJ80X50-20 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 SUJ80X50-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SUJ80X50-20 Is Used
Press Fit Tuning
Dialing in a precise insertion depth on-site where material thickness varies, using the 20 mm adjust screw to set the exact end position without re-engineering the fixture.
Variable Height Sealing
Adjusting the extend stroke on a sealing head to accommodate different container flange heights, trimming the 50 mm nominal stroke down to the exact 30-50 mm needed.
End-of-Line Diverter
Setting a custom stop position for a diverter arm on a packaging line, allowing rapid field changes to the extend endpoint as product formats change.
Replacing the Airtac SUJ Adjustable Cylinder SUJ80X50-20 with the SAUJ80X50-20
To replace the discontinued SUJ80X50-20, order the direct replacement SAUJ80X50-20, keeping the 50 mm nominal stroke and 20 mm adjust window. Choose the 20 mm adjust window when you need precise end-position tuning without shimming; the stop screw simply trims the extend stroke on-site. Mounting is compatible with AirTAC SC-series FA and LB brackets. Because this non-magnetic SKU cannot take a switch, migrating to the SAUJ lets you adopt current CMSG/DMSG/EMSG sensors if you add the -S option. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ80X50-20
- ✓ 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 SUJ80X50-20 FAQ
Yes, the SUJ80X50-20 is discontinued. The direct replacement is the SAUJ80X50-20, which matches the 80 mm bore, 50 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. The SAUJ also supports current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw provides a 20 mm adjust window, allowing you to shorten the 50 mm nominal extend stroke down to 30 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ80X50-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ80X50-20 replacement — usually within 7-8 hours.