Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 MACJ20X75-30SLB
The MACJ20X75-30SLB pairs a 20 mm bore with a 75 mm stroke and a 30 mm extend-trim window, so the forward stroke can be shortened on site with a stop screw instead of ordering a custom length. It is double-acting with a variable air cushion at each end and runs on filtered air from 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s. At 0.5 MPa it pushes with 157 N and pulls with 132 N; at 0.7 MPa push climbs to 220 N.
Its riveted stainless-steel barrel and hard-chrome plated rod shrug off washdown and humidity far better than painted minis, with aluminium covers rolled onto the tube for a sealed round body. The magnet comes built in, so CMSG / DMSG / EMSG switches clip on out of the box. Plan on about 94 N of usable push at 0.5 MPa; vertically that is roughly 16 kgf at full rating, or about 8 kg lifted with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 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 MACJ20X75-30SLB
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB Is Used
Bottling-line gate trim
Foot-mounted stopper gate on a bottling conveyor where bottle heights change by batch; trim the 75 mm extend within the 30 mm window and re-run without swapping cylinders.
Feeder pusher indexing
Pushes cartons into an infeed lane on a food line; the stainless barrel tolerates daily washdown while the cushions settle each push at up to 800 mm/s.
Switch-checked fixture clamp
The built-in magnet drives a CMSG switch at both trim positions so the PLC confirms the gate is seated before filling starts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30SLB the Right Cylinder?
Compare across the MA range first: a 16 mm bore delivers 100.5 N push at 0.5 MPa while a 25 mm bore reaches 245.3 N, so the 20 mm sits mid-pack at 157 N. For reaction loads under about 90 N it is the sweet spot; step up to 25 mm above that. The LB foot base in this code anchors the body firmly to a machine plate, and the 30 mm window suits recipes needing a few trim steps. The stop screw shortens the extend stroke only - it is not a mid-stroke lock, and the rod still drifts if air is lost. Ports are 1/8" on this bore.
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 MACJ20X75-30SLB FAQ
At 0.5 MPa it pushes 157 N and pulls 132 N; at 0.7 MPa push is 220 N and pull 185 N; theoretical maximum is 32 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), with a 30 mm extend-trim window on a 75 mm stroke.
The LB foot fixes the stainless barrel to a machine plate for side-loaded pusher duty; FA flange and I / Y rod knuckles are alternatives. The standard piston magnet accepts CMSG / DMSG / EMSG switches with no special order.
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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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