
Genuine AirTAC slide cylinder, order code STWA20X100S from the STW range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
The STWA20X100S is a Dia 20 bore AirTAC STW series slide cylinder with 100 mm stroke and plate-fixed mounting, meaning the unit is bolted down through its end plate. Twin piston rods give the slide good resistance to bending and twisting, so moving and side loads can be carried directly on the table, and hydraulic shock absorbers cushion both stroke ends to slow impact and extend service life. Theoretical force is 201.1 N at 0.5 MPa and piping is via M5x0.8 ports.
This code carries the S option, a built-in magnet, so reed or solid-state switches can be clamped to the sensor mounting rail for end-position detection. The cylinder runs on air filtered to 40 um at 30 to 500 mm/s, handles 0.15 to 1.0 MPa (proof 1.5 MPa / 215 psi) and works from -20 to +70 C. Three sets of ports let you route the air lines from whichever side suits the machine layout.
| Order code | STWA20X100S |
|---|---|
| Product | Slide Cylinder |
| Mounting | Plate fixed (STWA) |
| Bore | Ø20 mm |
| Stroke | 100 mm |
| Action | Double acting, twin rod |
|---|---|
| Cushion | Hydraulic shock absorber |
| Ø10 | 50.3 N at 0.5 MPa · port M5×0.8 |
| Ø16 | 122.5 N at 0.5 MPa · port M5×0.8 |
| Ø20 | 201.1 N at 0.5 MPa · port M5×0.8 |
| Ø25 | 289.8 N at 0.5 MPa · port PT1/8 |
| Ø32 | 490.1 N at 0.5 MPa · port PT1/8 |
| Fluid | Air (filtered by 40 µm element) |
| Operating pressure | 0.2-1.0 MPa (Ø10), 0.15-1.0 MPa (Ø16-32) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to +70 °C |
| Speed | 30-500 mm/s |
| Stroke tolerance | +1.0 / 0 mm (≤100), +1.5 / 0 mm (>100) |
| Anti-rotation | ±0.1° (Ø10), ±0.05° (Ø16, 20), ±0.03° (Ø25, 32) |
| Port | M5×0.8 (Ø10-20), PT1/8 (Ø25, 32) |
Source: AirTAC Products Catalog 2026A (PDF01-P0547..P0548), STW series specifications, theoretical force, strokes and ordering code.
At 100 mm this is the shortest stroke of the longer Dia 20 plates, one step above STWA20X75S and one below STWA20X125S, with the whole 25 to 200 mm range available in 25 mm steps. It also sits exactly on the tolerance boundary: strokes up to 100 mm carry a +1.0/0 mm tolerance, while anything longer, such as STWA20X125S, opens to +1.5/0 mm. If your fixture needs tighter stroke accuracy, stopping at 100 mm is worth noting.
Against the same stroke in other bodies: STWB20X100S is body fixed instead of plate fixed, and Dia 16 (122.5 N) or Dia 25 (289.8 N) trade force down or up from the 201.1 N of this bore. Confirm the exact stroke list from the datasheet before ordering.
The twin-rod STW table resists twist to within +/- 0.05 deg on a Dia 20 bore, so a gripper mounted on the 100 mm stroke slide stays square when lifting parts between stations.
201.1 N at 0.5 MPa is enough to nudge cartons off a line, and hydraulic shock absorbers stop the table gently at each end of the 100 mm travel.
The built-in magnet works with switches on the sensor rail, so a PLC can confirm full forward and retracted position on the 100 mm stroke before the next cycle starts.
Dia 20 bore, 100 mm stroke, plate-fixed (STWA) mounting, built-in magnet. Theoretical force 201.1 N at 0.5 MPa, port M5x0.8, operating pressure 0.15 to 1.0 MPa (proof 1.5 MPa / 215 psi), speed 30 to 500 mm/s, temperature -20 to +70 C, anti-rotation within +/- 0.05 deg, stroke tolerance +1.0/0 mm, air filtered to 40 um.
STWA units are mounted through the end plate, STWB units through the body. Pick STWA20X100S when your machine table bolts against the end plate face; both the slide and the body can still carry mounting loads, and three sets of M5x0.8 ports let you choose the piping direction.