This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ50X175-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ50X175-20 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 SUJ50X175-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X175-20 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 SAUJ50X175-20, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X175-20
About the Airtac SUJ Adjustable Cylinder SUJ50X175-20
The AirTAC SUJ50X175-20 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 stroke. The nominal 175 mm is the maximum. This bore delivers 982 N push and 825 N pull at 0.5 MPa, rising to 1374 N push at 0.7 MPa. It features a 1/4" port, an M16x1.5 rod thread, and 21 mm adjustable cushions.
This SUJ model is discontinued and the exact drop-in replacement is the SAUJ50X175-20, matching the bore, stroke, force, and SC-series FA/LB mounting. The upgrade path moves sensing from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. 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 this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SUJ Adjustable Cylinder SUJ50X175-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X175-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X175-20 |
| 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 SAUJ50X175-20 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 SAUJ50X175-20 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 SUJ50X175-20
| 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 SUJ50X175-20 Is Used
Custom Fixture Clamping
Trimming the extend stroke by up to 20 mm on-site allows operators to dial in the exact clamping position for varying part widths without machining custom spacers.
Variable-Length Sorting Diverter
A 155-175 mm extend window provides the flexibility to reposition a diverting gate on a packaging line to accommodate different box sizes on the fly.
Adjustable Height Stopper
Field-tuning the extend stroke lets a pneumatic stopper pin catch products of varying heights accurately before they enter a secondary processing station.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X175-20 with the SAUJ50X175-20
To replace the discontinued SUJ50X175-20, order the drop-in SAUJ50X175-20. Both share the 50 mm bore, 175 mm max stroke, 20 mm adjust window, 1/4" port, and FA/LB mounts. When sizing, the 0.5 MPa push yields a 589 N safe working load (60% factor) or a 50 kg vertical lift with a 2:1 margin; if undersized, the neighboring 63 mm bore offers 1559 N push at 0.5 MPa. Choose the 20 mm adjust window if you need precise field tuning of the extend end position. Because this SKU lacks a magnet, it cannot take a switch; the SAUJ upgrade uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding. The stop screw is not a lock—add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X175-20
- ✓ 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 SUJ50X175-20 FAQ
Yes, the SUJ50X175-20 is discontinued. The exact drop-in replacement is the SAUJ50X175-20, which matches the 50 mm bore, 175 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The 50 mm bore provides 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and 1767 N push at 0.9 MPa, with a theoretical max of 200 kgf at 1.0 MPa. The external stop screw trims the extend stroke by up to 20 mm on-site, giving a usable 155-175 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
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