This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X50 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X50 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 SUD40X50
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X50 is a double-acting profile-type standard cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X50
About the Airtac SUD Series Double Rod Cylinder SUD40X50
The AirTAC SUD40X50 is a discontinued double-acting double-rod profile cylinder delivering equal force both ways (528 N at 0.5 MPa, 739 N at 0.7 MPa, 950 N at 0.9 MPa) via a 16 mm rod and 1/4 inch port. Because the rod exits both ends, push and pull forces are identical, preventing rod deflection and allowing a second tool to be driven from the back side. The exact drop-in replacement is the SAUD40X50, matching the 40 mm bore, 50 mm stroke, force, and FA/LB mounting.
This non-magnetic SKU cannot accept a piston switch, but the SAUD upgrade supports current CMSG/DMSG/EMSG sensors (this legacy unit used CS1-B/DS1-B). For sizing, the 528 N output at 0.5 MPa yields a safe working load of about 317 N, translating to a vertical lift capacity of roughly 27 kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required to hold loads without live air.
Airtac SUD Series Double Rod Cylinder SUD40X50 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X50 |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 SAUD40X50 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAUD40X50 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 SUD40X50
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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 SUD Series Double Rod Cylinder SUD40X50 Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from a single piston, utilising the equal both ways force to machine parts on both ends efficiently.
Anti-Rotation Transfer Gate
Uses the twin rods exiting both ends to prevent mechanical deflection and rotation while indexing heavy components between conveyor belts.
Compact Vertical Lift
Lifts loads up to 27 kg vertically with a 2:1 safety margin, fitting into tight machinery spaces due to the shorter profile barrel.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X50 with the SAUD40X50
To replace the discontinued SUD40X50, order the drop-in SAUD40X50, which preserves the 40 mm bore, 50 mm stroke, 1/4 inch port, and FA/LB mounting. When sizing both ways, verify your force needs against the equal both ways output (528 N at 0.5 MPa, 950 N at 0.9 MPa) and check neighbouring bores (32 mm or 50 mm) if margin allows. Choose a double-rod design when you need anti-rotation stability or want to drive a second tool from the back rod. If upgrading sensing, note this non-magnetic SKU cannot take a switch, whereas the SAUD uses CMSG/DMSG/EMSG sensors. For strokes >=300 mm, ensure adequate side-load guidance to prevent binding.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X50
- ✓ 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 SUD40X50 FAQ
Yes, the SUD40X50 is discontinued. The exact drop-in replacement is the SAUD40X50, which matches the 40 mm bore, 50 mm stroke, 1/4 inch port, and FA/LB mounting.
It provides equal force both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The air port is 1/4 inch. The cushions only decelerate; they do not hold loads without live air.
Request a Quote for the SAUD40X50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD40X50 replacement — usually within 7-8 hours.