This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAU50X870STC — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAU50X870STC 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 SU32~50 Standard Cylinder SU50X870STC
The AirTAC Airtac SU32~50 Standard Cylinder SU50X870STC is a double-acting profile-type standard cylinder with a Ø50mm bore and 870mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAU50X870STC, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke870 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X870STC
About the Airtac SU32~50 Standard Cylinder SU50X870STC
The AirTAC SU50X870STC is a discontinued double-acting profile cylinder with an 870 mm stroke and 50 mm bore, delivering 982 N push and 825 N pull at 0.5 MPa through a 1/4" port. AirTAC replaced this end-of-life unit with the SAU50X870STC, a true drop-in alternative retaining the exact bore, stroke, output force, port size, and SC-series TC mounting footprint.
The SAU upgrade modernizes the sensor groove, requiring CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B reed sensors used here, and introduces the SAUF built-in 4M valve option the SU line lacked. For sizing, a safe working load is roughly 589 N (60% of the 0.5 MPa push), equating to a 50 kg vertical lift with a 2:1 margin. Because this 870 mm stroke creates a long lever arm, external guide rails are recommended to prevent rod bending under side loads.
Airtac SU32~50 Standard Cylinder SU50X870STC Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X870STC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X870STC |
| Bore size | Ø50 mm |
| Stroke | 870 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 SAU50X870STC 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 SAU50X870STC 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 SU32~50 Standard Cylinder SU50X870STC
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×870 | 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 SU32~50 Standard Cylinder SU50X870STC Is Used
Long-Reach Diverting
Pushes packages across a wide conveyor belt using the 870 mm extension, relying on the 982 N thrust at 0.5 MPa to handle heavy cartons smoothly.
Vertical Lift Gates
Actuates elevated loading dock gates where a 50 kg lift capacity with a 2:1 safety margin is sufficient, provided an external check valve holds the load.
Material Ejection
Ejects molded parts from deep press beds, utilizing the TC mount for secure centerline trunnion support on the lengthy 870 mm stroke.
Replacing the Airtac SU32~50 Standard Cylinder SU50X870STC with the SAU50X870STC
To replace this discontinued SU50X870STC, order the SAU50X870STC, confirming the 50 mm bore, 870 mm stroke, 1/4" port, M16x1.5 rod thread, and TC mounting. The -S magnet transfers over, but you must upgrade to CMSG/DMSG/EMSG sensors since the SAU drops CS1-B/DS1-B compatibility. For sizing both ways, a 40 mm bore yields 628 N push at 0.5 MPa (too small), while a 63 mm bore yields 1559 N; alternatively, pushing this 50 mm bore to 0.7 MPa provides 1374 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so add an external rod lock for vertical holding. Finally, the 870 mm stroke demands external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same bore / stroke → SAU50X870STC
- ✓ 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 SU32~50 Standard Cylinder SU50X870STC FAQ
Yes, the SU50X870STC is discontinued. The exact drop-in replacement is the AirTAC SAU50X870STC, which matches the 50 mm bore, 870 mm stroke, 1/4" port, and TC mounting. You simply order the SAU equivalent.
At 0.5 MPa it pushes 982 N and pulls 825 N; at 0.7 MPa it pushes 1374 N, with a theoretical max of 200 kgf at 1.0 MPa. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches; the SAU replacement requires CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
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