This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD50X40S, 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 SUD Series Double Rod Cylinder SUD50X40S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X40S is a double-acting profile-type standard cylinder with a Ø50mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD50X40S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X40S
- 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 SUD Series Double Rod Cylinder SUD50X40S
The AirTAC SUD50X40S is a double-acting, double-rod profile cylinder featuring a 50mm bore and 40mm stroke. Because a rod exits both ends on a single piston, the push and pull force is equal both ways, rated at 825N at 0.5MPa, 1154N at 0.7MPa, and 1484N at 0.9MPa. This SUD model is discontinued and the direct replacement is the SAUD50X40S, which retains the same compact aluminium profile barrel, 1/4" port, M16x1.5 rod thread, and FA/LB mounting. The SAUD upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit uses CS1-B/DS1-B switches.
A rear rod provides an anti-rotation benefit and can carry a sensor cam to drive two tools simultaneously. Note that the air cushion only decelerates near stroke end; an external rod lock is required for load holding on air loss.
Airtac SUD Series Double Rod Cylinder SUD50X40S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X40S |
| Bore size | Ø50 mm |
| Stroke | 40 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 SAUD50X40S 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 SAUD50X40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUD Series Double Rod Cylinder SUD50X40S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 SUD50X40S Is Used
Dual-Tool Machining
Drives two opposing machining heads with equal both-ways force, using the rear rod to carry a sensor cam for synchronized operation.
Anti-Rotation Transfer
Transfers parts along a conveyor without rotational drift, leveraging the double-rod profile to maintain precise alignment.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X40S with the SAUD50X40S
To replace the discontinued SUD50X40S, select the direct replacement SAUD50X40S, ensuring you swap the legacy CS1-B/DS1-B sensors for current CMSG/DMSG/EMSG switches. Size both ways by checking neighbour bores while confirming the equal both-ways force fits your load. Choose a double-rod design when you need anti-rotation or must drive two tools. Mounting is limited to Basic, FA, and LB (SC-series compatible only). For stroke lengths of 300mm or greater, verify the side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X40S
- ✓ 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 SUD50X40S FAQ
Yes, the SUD50X40S is discontinued. The direct replacement is the SAUD50X40S, which matches the 50mm bore, 40mm stroke, equal both-ways force, and 1/4" port, but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The SUD50X40S features a 1/4" air port and delivers equal force both ways: 825N at 0.5MPa, 1154N at 0.7MPa, and 1484N at 0.9MPa. It operates at 0.15-1.0MPa with adjustable 21mm cushions at each end.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD50X40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD50X40S replacement — usually within 7-8 hours.