
The AirTAC Airtac B01-MAJ Special Purpose Cylinder B01-MAJ25X100-50S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø0mm bore and 100mm stroke, PT/G air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
Fifty millimetres of on-site stroke adjustment gives the MAJ25X100-50S unusual flexibility for a 25 mm bore: turn the external stop screw and the extend stroke lands anywhere within the 50 mm window, while the full 100 mm travel stays available. At 0.5 MPa expect 245.3 N on extend and 206.1 N on retract.
Construction is the classic MA recipe - a stainless-steel barrel rolled onto aluminium-alloy covers with a stainless-steel block, sealed by a two-way piston seal that also stores grease, and a 20 um hard-chrome plating on the carbon-steel rod to resist scoring. If your fixture only needs about 147 N of real force at 0.5 MPa - 60 percent of the rated push - this cylinder still carries margin for pressure dips.
| Model | Airtac B01-MAJ Special Purpose Cylinder B01-MAJ25X100-50S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø0 mm |
| Stroke | 100 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. |
| ×100 | Stroke length in mm. |
| -50 | 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.
A QC bench cycles clutch packs at 343.4 N (0.7 MPa), and the 50 mm window lets the operator set ram dwell depth per part number.
A gate under a snack-food weigher drops batches; the stainless round body shrugs off flour-dust wipe-downs, and LB feet bolt it straight to the frame.
Sorting trays of different widths on a conveyor, one cylinder covers all via the 50 mm stop range, with a Y knuckle for the pivoting pusher arm.
Compare both directions before ordering: push at 0.5 MPa is 245.3 N and pull is 206.1 N, so retraction-heavy jobs may prefer the 32 mm bore (402.2 N / 345.6 N); the 20 mm alternative delivers 157.0 N / 131.9 N. Because the adjuster shortens the extend stroke but cannot lengthen it past the ordered 100 mm, order the full stroke you might ever need - it is well under the 300 mm standard limit for this bore. FA flange and LB foot mount; I and Y knuckles suit pivoting loads. The stop sets extend position only - it is not a brake, and drift is possible on pressure loss.
Quick checklist
At 0.5 MPa: 245.3 N extend, 206.1 N retract. At 0.7 MPa: 343.4 N extend, 288.5 N retract. Theoretical maximum force is 50 kgf at 1.0 MPa. Air supply is 0.15-1.0 MPa (22-145 psi), ports are 1/8" on the 25 mm bore.
The riveted stainless barrel and 20 um hard-chrome plated carbon-steel rod resist corrosion in damp, food-adjacent or outdoor spots where painted mini cylinders blister, while aluminium-alloy covers keep the body compact for tight machine layouts.
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