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Reversing-groove drum Ø30 × 90: crossed right- and left-hand grooves, pitch 30, 5 wide

What is a reversing screw drum? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: level wind drum, reversing screw, diamond screw, double thread drum, tambor de ranura cruzada, Kreuzgewindewalze (Kehrgewinde)

Exact dimensions. True size, with no printing tolerance added.

length
30.0 mm
width
30.0 mm
height
90.0 mm

Notes

  • Ø30 × 90 cylinder (Ø5 bore) with two 5 mm wide, 3 mm deep grooves cut over the middle 60 mm: one right-hand and one left-hand helix of 30 mm pitch (two turns each), crossing each other at 180° and meeting at 0°. Each groove is 5 mm wide measured square to its path at the bottom (5.38 mm axially; helicoid flanks, 0.17 mm wider at the surface). A Ø5 pin in the groove runs 60 mm up in two turns of the drum, turns the corner and runs 60 mm back in the next two.
  • The level-wind (fishing reel, winch) drum: the turn-around is drawn as the sharp meeting of the two helices; a real traverser carries a keel-shaped shoe that is steered round it.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Reversing-groove drum Ø30 × 90: crossed right- and left-hand… size chart

dimensionvalue
drumØ30 × 90 mm
groovesRH + LH, pitch 30, 2 turns each
groove5 wide × 3 deep
traverse60 mm per 2 turns
boreØ5

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Henry T. Brown (1868, public domain)Five Hundred and Seven Mechanical Movements — scan on archive.orgwebPublisher's page; dimensions are facts
507movements.comBrown's movement No. 108: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

reversing-groove-drum-30x90drum, axis Z, grooves z 15..75, both start at angle 0STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=reversing-groove-drum-30x90-p30

Reversing-groove drum Ø30 × 90: crossed right- and left-hand grooves, pitch 30, 5 wide, isometric render of a generated part
Render of reversing-groove-drum-30x90 from the free STEP; not to scale.

Fits with

Reversing-screw drum and traverser (uniform to-and-fro traverse), isometric render of a generated part
Reversing-screw drum and traverser (uniform to-and-fro traverse)5 sizes★ 1 file

Questions

What is a reversing screw drum?

Ø30 × 90 cylinder (Ø5 bore) with two 5 mm wide, 3 mm deep grooves cut over the middle 60 mm: one right-hand and one left-hand helix of 30 mm pitch (two turns each), crossing each other at 180° and meeting at 0°. Each groove is 5 mm wide measured square to its path at the bottom (5.38 mm axially; helicoid flanks, 0.17 mm wider at the surface). A Ø5 pin in the groove runs 60 mm up in two turns of the drum, turns the corner and runs 60 mm back in the next two.