Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X500-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X500-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 500mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 480–500mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke500 mm
- Adjustable480–500 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 MBLCJ40X500-20
The AirTAC MBLCJ40X500-20 is a compact double-acting aluminum mini cylinder featuring a rear travel stopper and tunable end-of-stroke cushioning. The rear adjuster lets you trim up to 20 mm of travel, creating a precise 480-500 mm usable stroke window. Driven by a Ø16 mm hard-chrome plated rod through a G1/4 port, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa. This 500 mm stroke length is the maximum standard range for this bore, suited to long-reach actuation tasks.
Unlike the fixed rubber bumper found on the base MBLJ, this MBLCJ variant uses a screw-tunable adjustable air cushion at both ends to decelerate heavy loads smoothly. Note that this specific SKU lacks a built-in magnet (-S omitted), meaning it cannot support CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed barrel and grease-retaining piston seal ensure durable operation, while the rear stopper sets the end position without locking the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X500-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X500-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Adjustable window | 480–500 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 MBLCJ40X500-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 MBLCJ40X500-20 Is Used
Long-Reach CNC Tool Changer
Extends 500 mm to swap heavy tool holders in an enclosed machining center, using the adjustable air cushion to soften end-of-stroke impact and protect the spindle alignment.
Packaging Folder Arm
Pushes corrugated carton flaps closed on a high-speed packaging line, leveraging the 628 N push force and the 20 mm rear stroke trim to fine-tune the folding endpoint.
Palletizer Push-Off Mechanism
Cycles full length to push assembled pallets onto a discharge roller conveyor, relying on the tunable cushioning to decelerate the 128 kgf maximum load before impact.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X500-20 the Right Cylinder?
Select this Ø40 mm bore when you need 628 N of thrust at 0.5 MPa (880 N at 0.7 MPa) across a long 500 mm travel. If your application requires less force, stepping down to the Ø32 mm bore yields 402 N push at 0.5 MPa; if you need more power, stepping up to the Ø50 mm bore provides 981 N. Because this cylinder is configured at its maximum standard stroke of 500 mm, the small 16 mm rod is highly susceptible to side-loading and bending—always use an external guide rail to support the load. The rear stroke adjuster and the adjustable air cushion tune travel limits and deceleration, but neither component acts as a mechanical lock to hold position without continuous air pressure.
Mounting is restricted to Basic, FA (flange), or LB (foot) styles; SDB pivot and back-cover options are not available on the MBLCJ series. The overall length equals A + 2 x stroke + adjust. For a direct replacement, match the 40 mm bore, 500 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and confirm no magnet is required.
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 MBLCJ40X500-20 FAQ
At 0.5 MPa, this double-acting 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 when operated at the 1.0 MPa pressure limit.
This specific SKU (MBLCJ40X500-20) lacks the -S code, so it has no built-in magnet and cannot accept CMSG, DMSG, or EMSG position switches. The rear adjuster trims up to 20 mm of travel, giving a usable 480-500 mm window, but it functions only as a travel stop, not a load-holding lock. The adjustable air cushion is tuned separately via screws at each end cover to control deceleration.
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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