The AirTAC AirTAC MA20X50SU Mini Cylinder 20x50 PT, U Back Cover is a genuine double acting standard round-body mini air cylinder with a Ø20mm bore and 50mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
A compact double-acting round-body mini cylinder, the MA20X50SU pairs a 20 mm bore with a 50 mm stroke and a U flat-end back cover for rigid, bracket-free fixing. Inside, a high-precision stainless-steel barrel carries a hard-chrome plated (20 um) carbon-steel rod, with aluminium-alloy covers rolled onto the tube for a sealed, riveted body. At 0.5 MPa it delivers 157.0 N on the push stroke and 131.9 N pulling back, rising to 219.8 N and 184.7 N at 0.7 MPa, with a theoretical ceiling of 32.0 kgf at 1.0 MPa. Air feeds through a 1/8 inch port, and fixed anti-impact bumper pads soften both stroke ends. For sizing, treat roughly 94 N of the 0.5 MPa push figure as usable work rather than the full 157 N, and note this bore raises about 8 kg vertically once a 2:1 lift margin is applied. A magnet comes built in as standard, so CMSG, DMSG or EMSG reed switches can be clipped straight onto the barrel for end-of-stroke signalling without any special piston order.
| Model | AirTAC MA20X50SU Mini Cylinder 20x50 PT, U Back Cover |
|---|---|
| Series | MA mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MA | Standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
A 50 mm stroke is enough to nudge misaligned snack packs sideways off a conveyor; the 157 N push at 0.5 MPa clears a jammed row, and the stainless barrel copes with daily wipe-downs.
Raising a lightweight sample tray of about 8 kg vertically sits comfortably inside the 20 mm bore with a 2:1 margin, while the built-in magnet feeds a CMSG switch to confirm tray-up position.
Ejecting finished connector housings from a nest takes short, quick 50 mm kicks; the flat-end U back cover bolts the body flush against the jig plate with no adapter bracket.
Check the 20 mm class against its neighbours: the 16 mm MA16X50SU pushes 100.5 N at 0.5 MPa, while stepping up to a 25 mm MA25X50SU lifts the push force to 245.3 N - pick the larger bore whenever a jam or dirt drag could spike the load. Remember that once the supply valve centres or air is lost, the rod drifts freely; a pilot check valve or rod lock is the fix for loads that must stay put. The U flat-end cover bolts straight to machine plates, and FA flange, LB foot or SDB pivot brackets are available if the mounting needs changing later.
Quick checklist
At 0.5 MPa this 20 mm bore double-acting cylinder pushes with 157.0 N and pulls with 131.9 N. At 0.7 MPa those rise to 219.8 N and 184.7 N. The theoretical maximum is 32.0 kgf at 1.0 MPa. Stroke is 50 mm, the rod is 8 mm diameter with an M8x1.25 male thread, the port is 1/8 inch, and working pressure spans 0.15-1.0 MPa (22-145 psi) at speeds of 30-800 mm/s.
The U flat-end back cover lets you bolt the cylinder body directly to a flat machine surface without a pivot bracket, and FA flange, LB foot or SDB pivot mounts remain orderable if the layout changes. Because the magnet is built in as standard equipment, CMSG, DMSG or EMSG switches drop onto the stainless barrel for position feedback straight away - no special-order piston is needed.
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