This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X170-50-S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The MBLJ replacement upgrades to a riveted rolling-packed body and CMSG / DMSG / EMSG sensors (the MAL used CS1-M / DS1-M).
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S
The AirTAC MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 50 mm, giving a usable end-position window from 120 to 170 mm. This model is discontinued — the direct replacement is the MBLJ20X170-50-S.
- BoreØ20 mm
- Stroke170 mm
- Adjust window120–170 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X170-50-S
- 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 MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S
The AirTAC MALJ20X170-50-S is a discontinued double-acting, double-rod adjustable-stroke mini cylinder. It has a 20mm bore, 170mm stroke, and a 50mm rear adjuster, yielding a usable end-position window of 120-170mm. The direct replacement is the MBLJ20X170-50-S, matching the bore, stroke, adjust code, G1/8 port, and FA/LB mounting.
This SKU features a -S magnet for CS1-M/DS1-M switches; the MBLJ20X170-50-S upgrade shifts to CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers and a fixed rubber bumper, while the MBLJ uses a riveted rolling-packed body. The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. At 170mm, the 8mm rod is vulnerable to side-load bending, so guide the load externally.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X170-50-S |
| Bore size | Ø20 mm |
| Stroke | 170 mm |
| Adjustable window | 120 – 170 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.1 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Fixed rubber bumper |
| Max standard stroke | Up to 300 mm |
The rear adjuster is a travel stop, not a lock — it sets the end position but does not hold the load without live air. No back-cover code and no SDB on adjustable-stroke. The MBLJ20X170-50-S carries the same ratings.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 132 N | 132 N |
| 0.7 MPa | 185 N | — |
| Max (@1.0 MPa) | 27 kgf | |
MALJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod MAL push of the same bore. The MBLJ20X170-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×170 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 120–170 mm window. |
| S | Optional magnet for a CS1-M / DS1-M sensor (MBLJ uses CMSG/DMSG/EMSG). |
Replacement: MALJ → MBLJ. No back-cover (CA/U/CM) and no SDB. Mounting: FA / LB.
Where the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S Is Used
Dispenser Nozzle Height
Fine-tune the retraction distance on an adhesive dispenser; the 50mm rear stopper lets you alter the nozzle lift height for different syringe sizes without rewriting the PLC logic.
Leather Skiving Press
Adjust the down-stroke on a leather skiving machine to control material thinning; the fixed rubber bumper absorbs the 132N pull impact while the rear screw sets the exact blade depth.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S with MBLJ20X170-50-S
To replace the MALJ20X170-50-S, order the exact direct replacement MBLJ20X170-50-S. Confirm the 20mm bore, 170mm stroke, 50mm adjust code, G1/8 PT port, and FA/LB mounting (there is no back-cover or SDB option). The -S magnet changes your sensor family from the older CS1-M/DS1-M to the newer CMSG/DMSG/EMSG. The 50mm adjuster is a travel stop, not a lock; add an external lock to hold loads. For this 170mm stroke, use a guide to prevent rod-bending side loads.
Upgrade checklist
- ✓ Order the MBLJ20X170-50-S (same bore/stroke/adjust)
- ✓ Same 120–170 mm adjustable window
- ✓ Adjuster is a stop, not a lock
- ✓ No back cover / SDB — plan an FA/LB mount
- ✓ Sensor: swap CS1-M/DS1-M → CMSG/DMSG/EMSG
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.1 – 1.0 MPa operating pressure.
- check The rear adjuster sets the end position — it is not a load lock.
- check No back-cover / SDB on adjustable-stroke — use FA / LB.
- check Front/rear covers are threaded — not for field disassembly.
- check For new builds, specify the MBLJ20X170-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X170-50-S FAQ
Yes, the MALJ20X170-50-S is discontinued. The direct replacement is the MBLJ20X170-50-S, which matches the 20mm bore, 170mm stroke, 50mm adjust code, G1/8 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design and the -S magnet now uses CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M.
The 50mm adjust code lets you trim the rear end position, creating a usable stroke window of 120-170mm. The adjuster is a travel stop, not a lock, and the cylinder uses a fixed rubber bumper, not an adjustable cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X170-50-S replaces this model 1:1.
Fast Dispatch
MBLJ replacements are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Recommended AirTAC MBLJ Replacements
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