Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 100mm 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.
- BoreØ40 mm
- Stroke100 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MACJ40X100-50S
Built on a riveted stainless-steel round barrel with a 20 um hard-chrome plated rod, the MACJ40X100-50S shrugs off mild corrosion and washdown better than painted-steel minis in damp or food-area duty. It is double-acting with a variable air cushion at both ends, and an external stop screw trims the extend stroke anywhere within a 50 mm window - the full 100 mm ordered stroke is the ceiling, never a starting point.
At 0.5 MPa this bore 40 body pushes about 628 N (528 N pulling); count roughly 377 N as usable work so the cushion and seals stay comfortable. Held vertically it can lift about 64 kg at line pressure, or about 32 kg if you keep a 2:1 margin for real part weights. Working envelope: 0.15-1.0 MPa (22-145 psi), 30-800 mm/s.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 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.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MACJ40X100-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S Is Used
Carton stop-and-release station
On a carton indexing conveyor, the 50 mm trim window lets you re-time the stop position after a rail changeout without swapping cylinders, and 628 N at 0.5 MPa holds back packed cartons.
Veneer press jig
Furniture shops use the stroke trim to seat panel presses on boards of varying thickness, with the both-end cushion absorbing the final clamp instead of the covers.
Fill-head height setting
Bottling lines changing bottle formats reposition the extend stroke inside the window by turning the stop screw - no shims, no downtime beyond the adjustment.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X100-50S the Right Cylinder?
A 25 mm bore of this series makes about 245 N at 0.5 MPa and a 50 mm bore about 981 N; this 40 mm body sits between with 628 N of push. One caution: the adjuster is an extend-stroke end stop, not a mid-stroke lock, so if air is lost the rod can still drift.
Mount with the FA flange or LB foot and add I or Y rod knuckles where the load pivots. The magnet is built in as standard, so CMSG, DMSG and EMSG switches clamp straight onto the stainless barrel. With a 100 mm stroke, keep side loads off the 16 mm rod or guide the load externally to avoid bending.
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 MACJ40X100-50S FAQ
At 0.5 MPa it pushes 628 N and pulls 528 N; at 0.7 MPa those rise to 880 N push and 739 N pull. Theoretical maximum at 1.0 MPa is about 128 kgf. Bore is 40 mm with a 16 mm rod and 1/8" ports.
No. Every MACJ cylinder has the magnet built in as standard, so CMSG, DMSG or EMSG switches can be added to the stainless barrel whenever the machine needs end-of-stroke or trimmed-position feedback.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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