This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ80X50-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ80X50-20 in place of this model. 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 drop-in 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
About the Airtac SUJ Adjustable Cylinder SUJ80X50-20
The AirTAC SUJ80X50-20 is a double-acting single-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. Bore 80 delivers 2513 N push and 2268 N pull at 0.5 MPa, rising to 3518 N push at 0.7 MPa. 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 exact drop-in 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. For sizing, a safe working load is roughly 1508 N (60% of the 0.5 MPa push), equating to a 128 kg vertical lift with a 2:1 margin. 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 — a true drop-in on output. 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 drop-in SAUJ80X50-20, keeping the 50 mm nominal stroke and 20 mm adjust window. If you need to size both ways, the neighbouring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N push. 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 exact drop-in 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 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. 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
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