Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 25mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB
Foot-mounted and rigid: the LB foot brackets under this MAC20X25SCALB bolt the 20 mm bore cylinder flat to a machine plate, giving a stable base for short, forceful pushes. Inside is the standard MAC recipe - stainless round barrel, hard-chrome plated 8 mm rod, aluminium covers rolled onto the tube. It is double acting with a variable air cushion at both ends and pushes 157 N at 0.5 MPa over a 25 mm stroke.
Cushioning at both ends matters on a rigidly footed cylinder, because the frame takes no shock once the needle screws are set for the load. Pull at 0.5 MPa is 131.9 N and 0.7 MPa raises push to 219.8 N; plan the duty around about 94 N of usable force at 0.5 MPa, the level that keeps seals and rod bearings living a long life. The magnet fitted as standard lets a DMSG switch report stroke position, while the CA pivot cover still takes a linkage on the rod side.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting + cushion |
| 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 | Variable air cushion, both ends |
| 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.
Theoretical Output Force (Ø20mm)
| 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.
Model Code: Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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.
Where the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB Is Used
Stopper on a small pallet line
Rises a stopper blade to halt small pallets at a workstation; the LB feet resist the push-back without twisting the cylinder body.
Box flap tucker
Presses a carton flap down before taping on a sealer; the 25 mm stroke matches flap height and the cushion stops the head bouncing off the box.
Sample tray lifter in a lab fixture
Lifts about 8 kg sample trays vertically in an analytical autosampler; the stainless barrel tolerates spills and frequent wipe-downs.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB the Right Cylinder?
Compare against the 16 mm bore at 100.5 N and the 25 mm bore at 245.3 N, both at 0.5 MPa - the LB feet add bending stiffness, so this size can run nearer its 94 N working figure than a pivot-mounted twin. The 25 mm stroke keeps rod overhang tiny, so side loads stay modest; still, guide heavier tooling externally. Vertically, the 32.0 kgf theoretical figure halved for margin means this bore lifts about 8 kg - fine for small fixtures, not heavy tooling. And since the piston is free when air is lost, a clamped part needs a pilot check valve or rod lock to stay held.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SCALB FAQ
Push is 157.0 N at 0.5 MPa with 131.9 N on the pull side; at 0.7 MPa push reaches 219.8 N, and the theoretical ceiling for a 20 mm bore is 32.0 kgf at 1.0 MPa. Pressure range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s.
Feet under the barrel lock the cylinder against reaction torque, useful when the rod pushes sideways against a fixed stop. Combined with the CA pivot rear cover you get a rigid base plus a free-moving rod end. Ports are 1/8", the cushion is adjustable at both ends, and the built-in magnet supports CMSG, DMSG and EMSG switches without any special order.
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