Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 300–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable300–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S
The AirTAC MBLCJ40X350-50S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The 50 mm adjustment code lets you trim the rear travel, creating a usable stroke window of 300 to 350 mm. This extended travel suits applications requiring significant reach within a riveted rolling-packed aluminum body.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy from heavy fast moves, protecting the end covers. The rear stopper sets the end position but does not lock the load, while the cushion only decelerates. The -S code means a built-in magnet is fitted for position detection, and the Ø16 mm hard-chrome plated carbon steel rod requires an external guide over this 350 mm span to prevent side-load bending.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 300–350 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 | 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLCJ40X350-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ40X350-50S Is Used
Long-Reach Ejector
Pushes finished molded parts out of an injection molding machine using 628 N of force over the 350 mm span, with the air cushion absorbing the impact at full extension.
Variable Stroke Dispenser
Trims the rear travel down to 300 mm via the adjuster to tune the shot size for an adhesive dispensing head, relying on the -S magnet for exact timing.
Carton Flap Folder
Actuates a long folding arm on a packaging line, using the adjustable end cushion to softly decelerate the 350 mm stroke and prevent tearing cardboard.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-50S the Right Cylinder?
If you need less force, stepping down to the 32 mm bore yields 402 N push at 0.5 MPa; stepping up to the 50 mm bore provides 981 N. Choose this MBLCJ over the MBLJ when your moving mass demands tunable air cushioning rather than a fixed bumper, or over the MBLC when you need the 300-350 mm adjustable travel window. Remember the adjuster is a travel stop, not a lock, so an external holding device is required if the air supply drops. Mounting is limited to Basic, FA, or LB (no SDB or back-cover options). For a direct replacement, match the 40 mm bore, 350 mm stroke, 50 mm adjust code, G1/4 port, PT thread, and the -S magnet. Because the stroke is 350 mm, always use an external guide to support the rod and prevent binding.
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 MBLCJ40X350-50S FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa the push force is 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The 50 mm rear adjuster acts as a travel stop, letting you set the usable stroke anywhere between 300 and 350 mm. The -S indicates a built-in magnet for use with AirTAC CMSG reed or DMSG/EMSG electronic sensors. Neither the adjuster nor the air cushion locks the load.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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