This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD50X20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD50X20 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 SUD Series Double Rod Cylinder SUD50X20
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X20 is a double-acting profile-type standard cylinder with a Ø50mm bore and 20mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD50X20, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X20
About the Airtac SUD Series Double Rod Cylinder SUD50X20
The AirTAC SUD50X20 is a double-acting, double-rod profile cylinder featuring a 50mm bore and 20mm stroke. Because a rod exits both ends on one piston, push and pull force are equal at 825N @0.5MPa. This discontinued model uses an extruded aluminum profile barrel and a 1/4" port. The exact drop-in replacement is the SAUD50X20, which matches the bore, stroke, force, and FA/LB mounting.
A double-rod design prevents piston rotation and lets the back rod carry a sensor cam or drive two tools. This SKU lacks a magnet (-S), so it cannot take magnetic switches. The safe working load is ~495N (60% of the 825N @0.5MPa), yielding a vertical lift of ~42kg with a 2:1 margin. Note that air cushions only decelerate; use an external rod lock for load holding.
Airtac SUD Series Double Rod Cylinder SUD50X20 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X20 |
| Bore size | Ø50 mm |
| Stroke | 20 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 SAUD50X20 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 SAUD50X20 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 SUD Series Double Rod Cylinder SUD50X20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×20 | 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 SUD Series Double Rod Cylinder SUD50X20 Is Used
Dual-Tool Transfer
Simultaneously drives two opposing grippers to pick and place parts from both ends of the 50mm bore cylinder without requiring a separate actuator.
Anti-Rotation Divert
The twin rods prevent piston twisting during rapid diverting strokes on a packaging line, ensuring the end-of-arm tooling stays perfectly aligned.
Compact Pin Press
Fits into tight machine frames with its short extruded profile barrel, delivering equal 825N force @0.5MPa to press pins from either direction.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X20 with the SAUD50X20
To replace the SUD50X20, order the SAUD50X20 drop-in upgrade. The SAUD retains the 50mm bore, 20mm stroke, 1/4" port, M16x1.5 rod thread, and FA/LB mounting. Size both ways by checking neighbor bores (40mm or 63mm) to ensure the equal-both-ways force fits your application. Choose a double-rod cylinder when you need anti-rotation or must drive two tools. If upgrading from a -S SUD, note that legacy CS1-B/DS1-B sensors are replaced by current CMSG/DMSG/EMSG sensors on the SAUD. For this 20mm stroke, side-load is minimal, but for strokes >=300mm, verify guide alignment to prevent seal wear. A plain cylinder drifts on air loss; add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X20
- ✓ 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 SUD Series Double Rod Cylinder SUD50X20 FAQ
Yes, the SUD50X20 is discontinued. The exact drop-in replacement is the SAUD50X20. It matches the 50mm bore, 20mm stroke, equal-both-ways force, 1/4" port, and FA/LB mounting.
The SUD50X20 provides equal force both ways: 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. It uses a 1/4" port with an M16x1.5 rod thread, and operates at speeds of 30-800mm/s.
Request a Quote for the SAUD50X20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD50X20 replacement — usually within 7-8 hours.