Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 20mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 0–20mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke20 mm
- Adjustable0–20 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MBLCJ40X20-20S
The AirTAC MBLCJ40X20-20S is a compact double-acting mini cylinder featuring a Ø16 mm carbon-steel rod and a 40 mm bore, delivering 628 N of push force at 0.5 MPa. It integrates a rear stroke adjuster allowing you to trim up to 20 mm of travel, creating a highly precise 0-20 mm usable end-position window. This is paired with an adjustable air cushion at both ends, providing screw-tunable deceleration to protect the end covers during fast, heavy moves.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model allows you to dial in end-of-stroke speed. The riveted aluminum barrel and heterogeneous two-way grease-retaining piston seal ensure durable, leak-free operation. The built-in magnet (-S) supports CMSG reed switches alongside DMSG and EMSG solid-state electronic sensors for exact position detection. Remember that the rear stopper sets the travel end; it is not a lock and will not hold a load without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 20 mm |
| Adjustable window | 0–20 mm (trim 20 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 MBLCJ40X20-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MBLCJ40X20-20S Is Used
PCB Router Head Feed
Drives a PCB depaneling router with exact 0-20 mm depth trimming, using the 628 N push force and tuned air cushions to prevent jarring stops on the Z-axis.
Bottle Capper Press
Applies precise downward pressure on plastic bottle caps, using the rear stopper to set the exact 20 mm compression window without crushing the cap.
Textile Yarn Guide
Shifts a yarn guide across a knitting machine, relying on the adjustable end cushions to decelerate the 880 N peak force smoothly and protect the end covers.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20S the Right Cylinder?
When sizing this 40 mm bore, you can step down to a 32 mm bore (delivering 402 N push at 0.5 MPa) for lighter duties, or step up to a 50 mm bore (providing 981 N push) if your payload requires more force. Choose the MBLCJ over the MBLJ when your cycle speed demands tunable cushioning rather than a fixed bumper, or the MBLC variant if your stroke length is fixed and does not need rear trimming. The rear travel stopper and the adjustable cushion only manage motion; neither device locks the rod, so external holding mechanisms are required for static load support. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB or back-cover options exist). For an exact replacement, match the 40 mm bore, 20 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and the -S magnet specification.
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 MBLCJ40X20-20S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The adjustable stroke is a rear travel stopper that lets you mechanically trim the end position within a 0-20 mm window. The adjustable air cushion is a screw-tunable valve that controls deceleration speed near the stroke ends. Neither acts as a lock; the cylinder requires live air to hold position.
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.
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