Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm 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).
- BoreØ20 mm
- Stroke40 mm
- Adjustable20–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- 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 MBLCJ20X40-20
The AirTAC MBLCJ20X40-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. You can trim up to 20 mm of travel at the rear, yielding a usable stroke window of 20-40 mm. Delivering 157 N of push force at 0.5 MPa, this 20 mm bore unit is built for light-duty positioning. It uses a G1/8 port and an Ø8 mm hard-chrome plated carbon steel rod.
Unlike the base MBLJ which relies on a fixed rubber bumper, this MBLCJ variant uses screw-tunable pneumatic cushions to decelerate the piston near the end caps, absorbing kinetic energy for faster cycling without smashing the end covers. Note that this specific SKU lacks a built-in magnet (-S), meaning it cannot accept AirTAC CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed barrel and grease-retaining piston seal ensure consistent friction over a 30-800 mm/s speed range.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 20–40 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X40-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | 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 MBLCJ20X40-20 Is Used
Pick-and-Place Nozzle Lift
Lifts delicate SMD components in electronics assembly, using the 20-40 mm adjustable window to dial in exact nozzle height while the air cushion prevents jarring stops at 157 N push force.
Micro-Clamp Actuation
Drives a small pneumatic clamp in watchmaking machining, where the 132 N pull force secures tiny gears and the rear stopper trims the jaw closure precisely.
Light-Parts Ejection
Ejects plastic injection-molded clips from a mold cavity, relying on the tunable cushions to decelerate the Ø8 mm rod smoothly at high cycle speeds.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-20 the Right Cylinder?
Choose this 20 mm bore when you need exactly 157 N of push force at 0.5 MPa. If your payload requires less energy, the next size down does not exist in this series, so you would step up to the 25 mm bore (245 N push) for heavier loads. Compared to the MBLJ, this MBLCJ provides tunable end-of-stroke deceleration rather than a fixed bumper shock. Compared to the MBLC, it adds the 20 mm rear travel stopper for variable positioning.
Remember that the rear adjuster is a hard travel stop, not a mechanical lock—it sets the end position but will not hold a load against external forces without live air pressure. Similarly, the air cushion only decelerates the piston; it does not brake or clamp the load. Mounting is limited to Basic, FA (flange), or LB (foot) styles, as there is no back-cover or SDB pivot option available. For a direct replacement, match the 20 mm bore, 40 mm stroke, 20 mm adjust code, G1/8 PT port, 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 MBLCJ20X40-20 FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The rear adjuster lets you trim up to 20 mm of travel, creating a 20-40 mm usable stroke window. It acts only as a mechanical travel stop and does not lock or hold the load. The adjustable air cushion at both ends solely controls piston deceleration near the end caps and also cannot hold position. Also, because this SKU lacks a magnet, it cannot be used with CMSG, DMSG, or EMSG sensors.
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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