Chem-Set MA 6.3-20LL Static Mixing Nozzle, 20 Element Luer Lock

The Chem-Set MA 6.3-20LL static mixer is a 20 element disposable helical mixer with a bayonet inlet and a screw-on luer lock outlet. It runs on 50 ml dual cartridges and the twist lock connection seats in a few degrees of rotation. The part that matters here is the outlet. The white nylon luer adapter threads on rather than being molded in, so it comes off and gets replaced without scrapping the mixer, and it gives you a straight inline profile that works in a robotic or automated dispense head. It is an alternative to the Medmix MAH 06-21L.

Key Product Details

Performance in Production

• Twenty elements in a 0.250 in bore is a long mix path for a 50 ml cartridge. Use it when a 16 element mixer has left you streaking or when the ratio is off 1:1.
• The element is a tight fit inside the polypropylene casing, which keeps material moving through the element instead of slipping past it.
• The luer adapter threads on and off, so a damaged or plugged tip does not scrap the whole mixer and you can fit a dispensing needle without an extra fitting.
• Straight inline profile with no offset at the outlet, which is what a robot or automated head needs to hold a consistent bead path.
• Bayonet connection seats in a partial turn, so changeover on a hand gun is fast and an operator can feel when it locks.
• Roughly 3 ml stays in the mixer, so purge and check the ratio at startup before you dispense onto a part. On a 50 ml cartridge that is real material, and it is the argument for not changing mixers more often than the job requires.

Common Applications

• Robotic and automated dispensing of two part adhesive from 50 ml cartridges
• Bench assembly with a manual 50 ml cartridge gun
• Two part epoxy, urethane, silicone, and methacrylate dispensing
• Precision bead work where a luer needle is threaded onto the mixer outlet
• Potting and encapsulating small electronic assemblies
• Gasketing and small part bonding in production cells

Available Sizes

• Chem-Set MA 6.3-20LL Static Mixing Nozzle, luer lock outlet, sold each, SKU CCX-MA-6.3-20LL
• Chem-Set MA 6.3-20S Static Mixing Nozzle, stepped tip outlet, sold each, SKU CCX-MA-6.3-20S

Cross-Reference and Alternative Part Numbers

The Chem-Set MA 6.3-20LL is an alternative to the Medmix MAH 06-21L. Same helical construction, same bayonet inlet for 50 ml dual cartridges, same luer lock outlet format, same 1:1 and 2:1 ratios. It is also used in place of luer lock mixing nozzles supplied for Loctite 50 ml cartridge adhesives and the Nordson TAH 190-620LL.

Element count and length differ between manufacturers in this format, so test the mixer in your process before committing a production run to it. If your dispense program is validated to a specific mixer, call us and we will walk through it with you.

Related Products

• Chem-Set MA 6.3-20S Static Mixing Nozzle, the stepped tip version of this mixer
• Nordson TAH 190-620LL Static Mixing Nozzle
• All static mixers, dispensers, and nozzles

How Luer Lock Mixers Work in Automated Dispensing

A static mixer has no moving parts. Material is forced through a fixed helical element that splits the stream and folds it back together at every segment. On a 50 ml cartridge the mixer is the last thing the adhesive touches, so a bad mix shows up in the bond and not on the gauge.

• Load the 50 ml dual cartridge into a manual gun, a pneumatic gun, or an automated dispense head.
• Seat the bayonet inlet against the cartridge outlet and twist to lock. A partial turn is all it takes, and it should feel positive.
• Thread the white nylon luer adapter onto the outlet if it is not already fitted. Snug by hand. Do not wrench it.
• Purge to waste until the bead comes out one uniform color. Roughly 3 ml sits in the mixer, and that first material has not seen the full element path.
• Dispense. If you need a finer bead, thread a luer dispensing needle onto the adapter rather than trimming the tip.
• At the end of the run or when the material approaches its working time, unlock the mixer and fit a fresh one. The cartridge stays sealed by the cured plug in the old mixer.

The reason the luer lock version exists is the dispense head. A stepped tip is molded as one piece, so if the tip gets damaged or plugs, the mixer is scrap and the program has to be re-taught to whatever the replacement sits at. A threaded adapter comes off, goes back on at the same height, and accepts a standard luer needle. On a robot cell that repeatability is worth more than the few cents of difference in the part.

Materials commonly run through this mixer include two part epoxies, polyurethanes, silicones, and methyl methacrylates.

Frequently Asked Questions

What is the Chem-Set MA 6.3-20LL static mixer used for?

It mixes two part adhesive dispensed from 50 ml dual cartridges, on hand guns and on automated dispense heads. The 20 element helix in a 0.250 in bore handles epoxy, polyurethane, silicone, and methyl methacrylate at 1:1 and 2:1.

Is the MA 6.3-20LL an alternative to the Medmix MAH 06-21L?

Yes. It is an alternative to the Medmix MAH 06-21L, built with the same helical construction, the same bayonet inlet for 50 ml cartridges, and the same luer lock outlet format. Medmix is the trademark owner of that part number. Element count and length are not identical across manufacturers in this format, so run a test before a production changeover.

What is the difference between the luer lock and the stepped tip version?

The luer lock version has a removable white nylon adapter that threads onto the outlet. The stepped tip version is molded in one piece. Choose luer lock when you need to fit a dispensing needle, when the outlet takes abuse and you want to replace just the tip, or when a robot cell needs a repeatable straight profile. Choose the stepped tip for general hand dispensing where neither applies.

What cartridge does the MA 6.3-20LL fit?

50 ml dual cartridges with a bayonet outlet, also called a twist lock outlet. If your cartridge uses a different connection, call us with the cartridge brand and we will match the right inlet.

What mix ratios does it work with?

1:1 and 2:1. For ratios further off balance than that, such as 4:1 or 10:1, call us before ordering and we will point you at the right bore and element count.

What is a bayonet static mixer?

It is a mixer with a two-lug inlet that seats against the cartridge outlet and locks with a partial turn. Bayonet, twist lock, and quarter turn all describe the same connection. It is the standard fitting on 50 ml dual cartridges.

Can the MA 6.3-20LL be reused?

No. The mixer is disposable and single use. The luer adapter is the only part that comes off, and that is for replacement rather than cleaning. Once adhesive sets inside the element there is no practical way to clear it.

Questions on fit for your dispensing setup? Call (800) 220-1966 or email [email protected].

Chem-Set is a Chemical Concepts brand. Medmix, Loctite, Nordson, TAH, and all referenced part numbers are trademarks of their respective owners. Part numbers are listed for identification and cross-reference only and do not imply endorsement, affiliation, or equivalence.