This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ50X175-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ50X175-20S 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 SUJ Adjustable Cylinder SUJ50X175-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X175-20S is a double-acting profile-type standard cylinder with a Ø50mm bore and 175mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUJ50X175-20S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X175-20S
About the Airtac SUJ Adjustable Cylinder SUJ50X175-20S
The AirTAC SUJ50X175-20S is a double-acting single-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 155-175 mm extension from the 175 mm nominal maximum. The 50 mm bore generates 982 N push and 825 N pull at 0.5 MPa, scaling to 1374 N push at 0.7 MPa. It features a 1/4" port, an M16x1.5 rod thread, and 21 mm adjustable air cushions at each end. This discontinued model is replaced by the SAUJ50X175-20S.
The drop-in SAUJ50X175-20S shares the exact bore, stroke, force, port, and FA/LB mounting, but upgrades to current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches on this -S magnet unit. For sizing, a safe working load is roughly 589 N (60% of the 0.5 MPa push), translating to a 50 kg vertical lift with a 2:1 margin. Note the stop screw sets the end position but is not a load lock; an external rod lock is required to hold loads on air loss.
Airtac SUJ Adjustable Cylinder SUJ50X175-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X175-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X175-20S |
| Bore size | Ø50 mm |
| Stroke | 175 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 SAUJ50X175-20S 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 SAUJ50X175-20S 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 SUJ Adjustable Cylinder SUJ50X175-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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 SUJ Adjustable Cylinder SUJ50X175-20S Is Used
Variable Depth Boring
Adjusts the extend stroke on-site to machine varying pocket depths without swapping the entire actuator.
Variable Pitch Sorting
Trims the extend position by up to 20 mm to push products into different sorting lanes on the fly.
Adjustable Height Stops
Fine-tunes the mechanical stop position for varying package sizes on a packing line.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X175-20S with the SAUJ50X175-20S
To replace the discontinued SUJ50X175-20S, order the drop-in SAUJ50X175-20S, which preserves the 50 mm bore, 175 mm max stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. If re-sizing, the neighbouring 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore yields 1559 N push at 0.5 MPa. Select the 20 mm adjust window if your extend stroke needs on-site tuning between 155 mm and 175 mm. When migrating the -S magnet option, switch from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. For strokes of 300 mm or longer, verify side-load limits to prevent rod bearing wear. The external stop screw sets end position and does not function as a load lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X175-20S
- ✓ 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 SUJ Adjustable Cylinder SUJ50X175-20S FAQ
Yes, the SUJ50X175-20S is discontinued. The exact drop-in replacement is the SAUJ50X175-20S, which matches the 50 mm bore, 175 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also offers the SAUF built-in-valve variant the SU line lacked.
The 50 mm bore provides 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a 200 kgf theoretical max at 1.0 MPa. The external stop screw window is 20 mm, allowing the extend stroke to be shortened from the 175 mm nominal maximum down to 155 mm on-site.
Related AirTAC SAU Cylinders
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