Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 80mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 40–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable40–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S
The AirTAC MBLCJ20X80-40S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 157 N push and 132 N pull force at 0.5 MPa. The 40 mm rear trimmer creates a usable 40-80 mm stroke window, ideal for varying pick-and-place distances. An integrated magnet (-S) enables position detection.
Unlike the fixed rubber bumper found on the base MBLJ, this model uses screw-tunable air cushions to decelerate the rod near the end caps, preventing impact damage during faster cycles. The 20 um hard-chrome plated carbon-steel rod operates within a riveted rolling-packed barrel using a heterogeneous two-way grease-retaining piston seal. Note that the rear stopper sets the travel end and the cushion manages deceleration; neither component mechanically locks or holds the load in place without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 40–80 mm (trim 40 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 MBLCJ20X80-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -40 | 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 MBLCJ20X80-40S Is Used
PCB Depaneling Router
Provides the 157 N push force needed to press a depaneling router bit into circuit boards, using the 40-80 mm stroke window to compensate for varying tool lengths.
Micro-Clamp Actuation
Tunes the end-of-stroke cushion to softly stop a delicate electronics test fixture, using the 8 mm rod and integrated magnet to confirm clamp closure.
Wire Guide Positioner
Shifts a wire guide carriage across a 40-80 mm path in a cable winding machine, relying on the adjustable air cushion to prevent sudden jerks at 80 mm.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40S the Right Cylinder?
Stepping down to the 20 mm bore is not an option as it is the smallest available, but moving up to the 25 mm bore increases your 0.5 MPa push force to 245 N if your payload exceeds 157 N. Choose this MBLCJ over the MBLJ when your cycle speeds require tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC when you need that 40 mm rear travel adjustment window rather than a fixed stroke. Mounting is limited to Basic, FA (flange), or LB (foot); there is no SDB pivot or back-cover option. To match this exact replacement, specify: 20 mm bore, 80 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and the -S magnet.
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 MBLCJ20X80-40S FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N push and 132 N pull force. At 0.7 MPa, the push force reaches 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The 40 mm adjustment is a mechanical travel stop that trims the usable stroke window down to 40-80 mm. The adjustable air cushion is a separate screw-tunable valve that controls deceleration near the end caps. Neither the stopper nor the cushion acts as a lock to hold the load without air.
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Genuine AirTAC parts produced by AirTAC factory.
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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