Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 20–40mm. Adjustable air cushion (both ends).
- BoreØ50 mm
- Stroke40 mm
- Adjustable20–40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable 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 MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S
The AirTAC MBLCJ50X40-20S is a compact double-acting mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers a robust 981 N push force at 0.5 MPa. The integrated magnet (-S) enables precise position detection. A rear stopper allows you to trim up to 20 mm of travel, creating a usable stroke window of 20 to 40 mm for exact end-positioning.
Unlike the fixed rubber bumper found on the base MBLJ, this model uses screw-tunable air cushions to decelerate heavy loads smoothly at the stroke extremes. The riveted aluminum barrel keeps the body light, while the Ø16 carbon-steel rod features 20 μm hard-chrome plating to resist wear. The heterogeneous grease-retaining piston seal maintains lubrication across the 30-800 mm/s speed range. The rear adjuster sets the travel end; it does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 20–40 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 500 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 50 | Bore size in mm. |
| ×40 | Nominal stroke length in mm. |
| -20 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S Is Used
Thermoforming Clamp
Provides 981 N of clamping pressure to secure plastic sheets in a thermoforming press, using the 20-40 mm adjustable window to dial in the exact material thickness.
Label Applicator Stop
Uses the tunable air cushion to softly decelerate a 40 mm stroke at high speed, preventing label smearing when stopping a moving applicator head.
Packaging Flap Folder
Delivers rapid 881 N pull force to tuck carton flaps on a packaging line, with the -S magnet confirming the retracted position to the PLC.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S the Right Cylinder?
If 981 N is excessive, step down to the 40 mm bore, which yields 628 N of push force at 0.5 MPa. For heavier conveying, step up to the 63 mm bore, providing 1558 N. Choose this MBLCJ over the MBLJ when your application requires tunable end-of-stroke deceleration rather than a fixed bumper impact. Select the MBLC variant if you need fixed standard stroke lengths without the rear adjuster.
The rear stroke adjuster and the air cushions regulate motion and travel limits but do not hold a load in place; external guidance or a lock is required for position holding. Mounting is limited to Basic, FA, or LB styles, as this series lacks a back-cover or SDB pivot option. For an exact replacement, match the 50 mm bore, 40 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and the -S magnet specification. The 40 mm stroke is well within the 500 mm maximum standard stroke for this bore, so no side-load concerns arise.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-20S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 981 N push and 881 N pull force. At 0.7 MPa, the push force is 1374 N. The maximum theoretical force is 200 kgf at 1.0 MPa.
The adjustable stroke is a rear mechanical stopper that limits travel to a 20-40 mm window, while the adjustable air cushion uses screw-tunable valves to decelerate the piston near the end covers. Neither feature locks or holds the load in place.
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 Adjustable-Stroke Cylinders
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