This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD40X370S, 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 SUD40X370S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X370S is a double-acting profile-type standard cylinder with a Ø40mm bore and 370mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD40X370S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke370 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X370S
- 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 SUD40X370S
The AirTAC SUD40X370S is a double-acting, double-rod profile cylinder featuring a 40mm bore and 370mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, meaning push and pull force are equal at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. This model is discontinued and the direct replacement is the SAUD40X370S, retaining the same 1/4" port, M12x1.25 rod thread, and FA/LB mounting. The SAUD upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy unit used CS1-B/DS1-B switches.
The dual-rod design prevents piston rotation and allows the back rod to drive a second tool or carry a sensor cam. Note that the air cushion only decelerates near stroke end; it does not hold loads on air loss, requiring an external rod lock for vertical holding. With a 370mm stroke, external guides are recommended to prevent rod bending under side loads.
Airtac SUD Series Double Rod Cylinder SUD40X370S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X370S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X370S |
| Bore size | Ø40 mm |
| Stroke | 370 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 SAUD40X370S 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 SAUD40X370S 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 SUD40X370S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×370 | 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 SUD40X370S Is Used
Dual-Tool Transfer
Drives two separate operations simultaneously using both the front and rear rod extensions, ensuring perfectly synchronized timing without adding a second cylinder.
Anti-Rotation Gripper
Powers a pick-and-place gripper where the second rod physically prevents the piston from twisting during rapid horizontal transfers, maintaining precise alignment.
Symmetric Pusher
Actuates a conveyor diverter where equal force in both directions ensures consistent part pushing and positive retraction without pressure spikes.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X370S with the SAUD40X370S
To replace the SUD40X370S, order the SAUD40X370S (inserting an A after the leading S), which matches the 40mm bore, 370mm stroke, 1/4" port, and FA/LB mounting. When sizing both ways, verify the equal push/pull force fits your load, checking neighbouring bores (32mm or 50mm) if margin is needed. A double rod is right when you need anti-rotation or a rear cam. The -S sensor suffix means you must change from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG switches. Because the stroke is 370mm (>=300mm), add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X370S
- ✓ 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 SUD40X370S FAQ
Yes, the SUD40X370S is discontinued. The direct replacement is the SAUD40X370S, which shares the same 40mm bore, 370mm stroke, 1/4" port, and FA/LB mounting. You will need to upgrade the piston switches from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG sensors.
Because it is a double-rod cylinder, force is equal both ways: 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. The air port is 1/4".
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X370S
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