Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S
Reach 250 mm without giving up the compact round MA body. This double-acting MACJ carries a variable air cushion at both ends, so the rod decelerates smoothly even at higher speeds or under a heavier mass, and a 75 mm stop-screw window lets maintenance trim the extend stroke on the machine instead of re-ordering a new cylinder. The riveted stainless barrel and hard-chrome plated 8 mm rod stand up to humid plant air and occasional hose-down.
Push at 0.5 MPa is 157 N; allow about 94 N for the actual duty, which still lifts roughly 8 kg vertically with a 2:1 margin. The magnet ships built in, so positioning with CMSG, DMSG or EMSG switches needs no special piston. Supply 0.15-1.0 MPa (22-145 psi); proof pressure 1.5 MPa (215 psi).
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + 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 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.
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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -75 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S Is Used
Loom gate actuation
Slides fabric gates on a weaving line; the 75 mm trim range dials the gate opening to the cloth width without re-plumbing.
Chute diverters
Moves a diverter plate across a 250 mm parcel chute; cushioned ends stop the plate slamming even at brisk cycle rates.
Cable coil feed
Feeds cable coils off a payout rack, the stainless body tolerating the humidity of a wire-drawing shop.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S the Right Cylinder?
For 250 mm of travel the 16 mm bore (100.5 N push at 0.5 MPa) suits very light gates, while the 25 mm bore (245.3 N) takes heavier shuttles. Long strokes see side loads: keep the load guided or flexibly coupled so the 8 mm rod is not bent over its full extension. The adjuster is a mechanical extend stop, not a load lock - expect drift if air is lost. FA flange or LB foot, I or Y knuckles, PT / G / NPT ports.
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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X250-75S FAQ
Push at 0.5 MPa is 157 N and pull is 131.9 N. At 0.7 MPa it gives 219.8 N push and 184.7 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. The extend stroke trims within the 75 mm window and the cushion at each end is variable.
Choose FA flange or LB foot, and I or Y rod knuckles where the load pivots. The variable air cushion at each end is tuned with the cover screws to absorb deceleration shock. Note the extend stop shortens stroke only within the 75 mm window and holds nothing if pressure drops.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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