Solid Brass Hair Stacker

Hold this in your hand. The first thing you’ll notice isn’t what it does—it’s what it weighs. At 40.6 grams (Size S) and 67.7 grams (Size L), this isn’t another hollow aluminum tube that tips over when you tap deer hair. The Rivfly Brass Hair Stacker sits on your bench like a chunk of old-world machinery, waiting to align elk hair with the precision your flies deserve.

The Frustration: Why Cheap Stackers Fail

If you’ve used plastic stackers, you know the ritual: Tap three times. Check. Still crooked. Tap again. Static cling sends half the fibers sideways. Tap harder. Now the stacker’s rolling across the table.

Aluminum stackers are better—until the anodizing scratches off and rough edges start shredding delicate CDC fibers. And don’t get us started on injection-molded bases that warp after a summer in the truck.

Rivfly Engineering: The Brass Solution

We machined this stacker from solid brass bar stock on a CNC lathe—the same process used for aerospace fuel fittings. Here’s what that means for your tying:

• Mass = Control: The 67.7g weight (Size L) keeps the stacker planted while you tap. No chasing it around the vise.
• Mirror-Polished Internal Bore: We hand-polish the inside chamber to remove CNC tool marks. Result? Hair slides down friction-free, and static discharge is minimized.
• Tapered Funnel Design: The flared top (23.8mm on Size L) accepts messy clumps; the precision bore (Ø9.5mm internal tube) organizes them into perfect bundles.
• Zero Wobble: The flat mating surfaces between tube and base are machined to <0.05mm tolerance. When you stack, fibers align to the bore, not to a crooked seam.

Two Sizes, One Philosophy

Size S (Small): 42.5mm height, 20mm base diameter, 40.6g. Built for #14-20 dry flies, nymphs, and precise CDC wings. The Ø5mm internal bore handles delicate fibers without crushing.

Size L (Large): 50.5mm height, 23.8mm base diameter, 67.7g. Designed for streamers, bucktails, and tarpon flies. The Ø9.5mm bore stacks heavy deer hair and coarse elk without jamming.

The Patina Promise

Brass isn’t stainless. It ages. Every tap darkens the finish, every thumb print adds character. In six months, your stacker will look like it’s been on a Montana guide’s bench for 20 years—because quality tools earn their scars. (If you prefer the factory shine, a quick polish with Brasso brings back the gold.)

Technical Specifications

• Material: CNC-Turned Brass
• Finish: Natural Brass (Uncoated, Develops Patina)
• Weight: S = 40.6g / L = 67.7g
• Internal Bore: S = Ø5mm / L = Ø9.5mm (Mirror-Polished)
• Base Diameter: S = 20mm / L = 23.8mm
• Height: S = 42.5mm / L = 50.5mm
• Tolerance: Mating Surfaces <0.05mm

Pro Tip

For ultra-fine CDC or synthetic fibers, lightly dampen the internal bore with a fingertip before stacking. The moisture eliminates static and guides fibers straight down. For coarse deer hair, tap on a hard surface (tying bench, not a mouse pad)—the brass mass transfers impact energy directly into alignment.