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HTD generator drive: 210 T crank gear and a 2208 bracket (14 : 1)

Name: HTD generator drive: 210 T crank gear and a 2208 bracket (14 : 1) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How do I gear a generator to a slow Stirling engine? · Hardware · basis: Module 1, 20° involute (ISO 53) as the site's spur gears; the catalog's 15 T pinion, its 2208 adaptor and the 2208 envelope

Long Earth Society build part. Parts of the HTD engines. The engines

Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features

sizes: 2 in table

Notes

210 : 15 = 14 : 1 at 112.5 centre distance: at 150 rpm the 2208 (KV 128, 14.4 Ω, published) turns 2100 rpm and makes 16.4 V open circuit.
The bracket bolts to the seal cap's outer face with three M4; the motor's base takes four M3 countersunk screws from the bracket's back.

Sizes

part	teeth	tip_mm	ratio
gear-m1-210t-b12	210	212.0	14.0
motor-bracket-2208-3in

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
gear bore	Ø12, M4 grub	Ø12 shaft	slide	gear-*
mesh	module 1, 210 : 15 at 112.5 centres	pinion-m1-15t-b6	designed	gear-*
bracket holes	3 × Ø4.5 on r 30; 4 × Ø3.4 countersunk 90° to Ø6	shcs-m4x12; csk-m3x8 into the motor base	designed	motor-bracket-*
shaft hole	Ø30	shaft and seal (no contact)	designed	motor-bracket-*

Where the files are

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

ISO	ISO 53 cylindrical gears, standard basic rack (20°, addendum 1 m, dedendum 1.25 m)	standard	dimensions are facts verify
T-Motor (maker's store page)	GB2208 gimbal motor KV128: internal resistance 14.4 Ω	web	maker page; values are facts verify
Long Earth Society	Engine builds	web, video	LES site

Free files

★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

gear-m1-210t-b12	crank gear module 1, 210 teeth, 20° (tip Ø212), 10 wide, hub Ø30 × 15, Ø12 bore, M4 radial tapped hole	STEP · STL
motor-bracket-2208-3in	generator bracket 5 thick: Ø76.2 disc on the seal cap (3 × M4 on r 30), arm to the motor 112.5 above the shaft, 2208 base holes countersunk	STEP · STL

Plain text: sheet.txt · JSON: /api/geometry?object=htd-generator-drive