Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 225mm 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
- Stroke225 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 MACJ20X225-50S
AirTAC's MACJ20X225-50S pairs a wide 50 mm adjustable window with the classic round mini build: stainless barrel, hard-chrome plated rod, riveted aluminium covers. Double-acting with variable air cushions at each end, it develops 157 N pushing and 131.9 N pulling at 0.5 MPa.
The adjuster shortens the extend stroke only - treat it as a stop, never as a brake, because the piston still coasts if air pressure drops. Use the cushion needles to tame 225 mm of travel at up to 800 mm/s. For sizing, 157 N divided by 9.81 is about 16 kg of theoretical lift; hold back to around 8 kg for a 2:1 vertical margin. The standard magnet accepts CMSG, DMSG and EMSG switches with no special order.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 225 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 MACJ20X225-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×225 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S Is Used
Lid press-off station
Breaking vacuum lids off filling heads - the 50 mm window absorbs different lid heights, and the roughly 8 kg vertical equivalent suits light lids.
Pallet gate flag
Cycling a warehouse gate flag across 225 mm, with an EMSG switch on the standard magnet confirming each cycle to the PLC.
Bench screw feeder
Feeding screws one at a time from a vibratory bowl escapement, where the stop screw sets the exact feed distance per fastener.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S the Right Cylinder?
Between the 100.5 N of a 16 mm bore and the 245.3 N of a 25 mm bore, this 20 mm model's 157 N at 0.5 MPa covers mid-range small-part handling. Remember the 50 mm adjuster sets the extend stop only - it is not a mid-stroke lock, and drift will occur without air. FA flange or LB foot mounting bolts straight in, and the standard magnet drops onto CMSG / DMSG / EMSG switch rails. On a 225 mm stroke, minimise side load to keep the hard-chrome rod and its bushings wearing evenly.
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 MACJ20X225-50S FAQ
157 N extend force and 131.9 N retract force at 0.5 MPa, climbing to 219.8 N and 184.7 N at 0.7 MPa; the 1.0 MPa theoretical maximum is 32 kgf. Air supply is 0.15-1.0 MPa (22-145 psi), cycling 30-800 mm/s.
Needle valves at both ends meter the exhaust so the piston decelerates over the last few millimetres; on a 225 mm stroke you can run near the 800 mm/s top speed and still stop a light slide quietly. Cushion effect is variable, so tune each end separately for the load in hand.
Authorized Export Seller
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.
Related AirTAC MACJ Cylinders
Request a Quote for Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.