
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ32X500-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø32mm bore and 500mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
The MAJ32X500-40S pairs a bore 32 piston with a 500 mm stroke and a 40 mm adjustable window: an external stop screw trims the extend stroke anywhere in that 40 mm range without swapping cylinders. It is double-acting, so air drives the rod out and back, and push force at 0.5 MPa reaches 402 N against 346 N on retract. Keep real work around 241 N of the rating at 0.5 MPa and the barrel keeps a comfortable margin in continuous duty.
A rolled stainless barrel with a hard-chrome plated 12 mm rod shrugs off washdown mist and outdoor damp far better than painted mini cylinders, and the riveted round body stays slim on long-travel machines. Every unit carries a built-in magnet, so CMSG, DMSG or EMSG switches clip on without a special-order piston. The fixed anti-impact pad softens stroke-end impact but is not an adjustable cushion - that feature belongs to the MACJ range.
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ32X500-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 500 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 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). |
|---|---|
| 32 | Bore size in mm. |
| ×500 | Stroke length in mm. |
| -40 | 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.
Extends a 500 mm sweep to push cartons onto an off-feed conveyor; the 40 mm window lets technicians fine-tune the end position after each changeover.
402 N at 0.5 MPa knocks bonded trim panels free from fixtures; working at about 241 N keeps cycle forces predictable and gentle.
The stainless barrel survives daily hose-downs while a DMSG switch confirms full extension at the trimmed stop point.
At 402 N push (0.5 MPa) this bore 32 sits above the MAJ25 (245 N) and below the MAJ40 (628 N); step down when the load is light, step up when you need over 400 N at half pressure. The stop screw is a mechanical end stop for the extend stroke only - if air is lost the piston can still drift, so add a separate brake for load holding. On a 500 mm stroke, guide the load externally: side loads bend the 12 mm rod and wear seals early. Mount with the FA flange or LB foot, add an I or Y rod knuckle for pivoting links, and run 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s.
Quick checklist
At 0.5 MPa the bore 32 barrel pushes 402 N and pulls 346 N; at 0.7 MPa that rises to 563 N push and 484 N pull. The theoretical ceiling is 82 kgf at 1.0 MPa. The port is 1/8 in, the rod thread M10x1.25, and the 500 mm stroke trims within a 40 mm window via the stop screw.
The magnet is built into every MAJ piston as standard, so CMSG, DMSG or EMSG reed switches mount directly on the stainless barrel. The anti-impact bumper pads at each end are fixed - they decelerate the stroke but are not adjustable air cushions; specify the MACJ series when cushioning is needed.
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