
The AirTAC Airtac B01-MAJ Special Purpose Cylinder B01-MAJ25X125-30S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø0mm bore and 125mm stroke, PT/G air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
Where tooling changes often, a wide 30 mm trim range pays off: MAJ25X125-30S is a double-acting 25 mm bore mini cylinder whose extend stroke is shortened to position by an external stop screw, adjustable anywhere within the ordered 30 mm. At 0.5 MPa it delivers 245.3 N of push and 206.1 N of pull, a 50 kgf class unit running on 0.15-1.0 MPa (22-145 psi) filtered air.
Construction is a stainless tube rolled onto aluminium covers with a chrome-plated 10 mm rod - a riveted round body that resists corrosion in wet or outdoor plants without paint to chip. Anti-impact bumper pads sit fixed at both stroke ends for quiet deceleration, and the piston magnet that ships standard accepts CMSG / DMSG / EMSG switches for stroke-end detection. Budget about 147 N for actual work at 0.5 MPa, enough to lift a 12 kg load vertically with a 2:1 safety margin.
| Model | Airtac B01-MAJ Special Purpose Cylinder B01-MAJ25X125-30S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø0 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | PT/G |
| Rod thread |
| 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 300 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 | 0 N | 0 N |
| 0.7 MPa | 0 N | 0 N |
| Max (@1.0 MPa) | 0 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 0 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -30 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -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.
Meters granulate from a small dosing hopper into blender batches, with the 30 mm range covering coarse and fine charge settings.
Halts a stainless tray carrier in a bakery oven loader so the next row aligns, then retracts for the following rack.
Raises a hot-melt nozzle skid on a corrugated box gluer line, trimmed in 30 mm to suit single or double bead patterns.
Neighbouring bores frame the choice: MAJ20 pushes 157.0 N and MAJ32 pushes 402.2 N, both at 0.5 MPa, so pick 25 mm when your duty hovers near 150 N. The trim screw is a hard stop for extend only - under air failure or a pulling load the rod can still move, so treat the adjusted position as repeatable but not locked. Bolt it down by FA flange or LB foot, add an I or Y rod knuckle if the tool needs a pivot, and clamp sensors straight on thanks to the built-in magnet. With 125 mm of stroke, carry side loads in external guides rather than the rod.
Quick checklist
Push is 245.3 N and pull is 206.1 N at 0.5 MPa; at 0.7 MPa expect 343.4 N push and 288.5 N pull; theoretical maximum is 50 kgf at 1.0 MPa. Stroke trim is 30 mm on extend, speed 30-800 mm/s, port size 1/8", rod 10 mm with an M10x1.25 male thread.
The barrel is stainless steel riveted to the covers and the 10 mm rod is hard-chrome plated, so coolant mist, condensation and outdoor rain do not flake paint or rust the body the way painted mini cylinders suffer. Wipe-down cleaning is straightforward and the bumper pads keep stroke-end noise down.
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