15 : 45
Straight bevel · AGMA 2005
m 2.2 · 20° · straight, AGMA 2005 proportions
The 15 : 45 pair (module 2.2, 3 : 1) with AGMA 2005's mid-face proportions.
Samples · Bevel Gear Designer
30 bevel gear pairs, ready to open
Miter gears, right-angle reductions, 3D-printed drives, angled shafts, inch pairs, spiral and hypoid. Each opens in the Bevel Gear Designer with the pinion and gear in mesh, in 3D, every setting in place and ready to change. Looking for something else? See the timing pulley, sprocket, gear and worm gear samples.
Use
15 : 45
Straight bevel · Gleason
m 2.2 · 20° · straight, Gleason proportions
The same pair in Gleason's heel-based proportions, the ones catalogue gears use.
15 : 45
Spiral bevel · 35°
m 2.2 · 20° · spiral 35°, pinion left hand
Curved teeth at a 35° spiral angle: more teeth in contact, smoother and quieter.
15 : 45
Hypoid · offset pinion
m 2.2 · 20° · hypoid, pinion left hand
The pinion moved off the gear's axis: a bigger, stronger pinion, as in car axles.
20 : 20
Miter pair · module 1.5, 20 teeth
m 1.5 · 20° · straight, Gleason proportions
The most common stock miter size: 20 teeth, module 1.5, Gleason proportions that match catalogue gears.
20 : 20
Miter pair · module 1, printed
m 1 · 20° · straight, AGMA 2005 proportions
A small printable miter pair on 5 mm D-flat shafts.
25 : 25
Miter pair · module 2, keyed
m 2 · 20° · straight, Gleason proportions
25-tooth module 2 miters on 12 mm keyed shafts.
30 : 30
Miter pair · module 3, 30 teeth
m 3 · 20° · straight, Gleason proportions
A heavy 1 : 1 corner drive: module 3, 20 mm keyed bores.
20 : 20
Miter pair · 16 DP on ½" hex
16 DP · 20° · straight, AGMA 2005 proportions
Robotics miters: 16 DP, 20 teeth, both on ½" hex shafts.
20 : 30
1.5 : 1 · module 2, 20 : 30
m 2 · 20° · straight, Gleason proportions
A gentle right-angle reduction, Gleason proportions.
20 : 40
2 : 1 · module 2, 20 : 40
m 2 · 20° · straight, Gleason proportions
The classic 2 : 1 bevel pair, as stocked by gear catalogues.
15 : 30
2 : 1 · module 1.5, 15 : 30
m 1.5 · 20° · straight, AGMA 2005 proportions
A compact 2 : 1 for printed gearboxes.
15 : 45
3 : 1 · module 2, 15 : 45
m 2 · 20° · straight, AGMA 2005 proportions
3 : 1 at right angles: a 15-tooth pinion into a 45-tooth gear.
15 : 60
4 : 1 · module 1.5, 15 : 60
m 1.5 · 20° · straight, AGMA 2005 proportions
4 : 1 in one bevel pair, for slow right-angle outputs.
16 : 80
5 : 1 · module 1, 16 : 80
m 1 · 20° · straight, AGMA 2005 proportions
The steepest pair here: 5 : 1, the gear almost a crown wheel.
18 : 18
NEMA 17 right-angle drive
m 1.5 · 20° · straight, AGMA 2005 proportions
Turn a stepper's output 90°: 18-tooth miters, 5 mm D-flat in, 8 mm out, tapped set screws.
15 : 60
Hand drill · 4 : 1, module 2
m 2 · 20° · straight, AGMA 2005 proportions
The egg-beater drill's drive: a big crank gear spins a 15-tooth pinion four times as fast.
16 : 48
Hand crank · 3 : 1 on ½" hex
m 2.5 · 20° · straight, AGMA 2005 proportions
A crank-driven 3 : 1 for mills and hand generators, both gears on ½" hex.
16 : 48
Hand crank · threaded set screws and hub pins
m 2.5 · 20° · straight, AGMA 2005 proportions
3 : 1 on round shafts: the pinion's set screws thread into the hub, the gear is pinned through its hub.
15 : 30
Small robot · 2 : 1, 3 mm D-flat
m 0.8 · 20° · straight, AGMA 2005 proportions
A tiny module 0.8 pair for N20-size gear motors on 3 mm D-flat shafts.
15 : 30
Rotisserie · 2 : 1 on 8 mm hex
m 1.5 · 20° · straight, AGMA 2005 proportions
A 2 : 1 corner drive for a spit or turntable, the gear on an 8 mm hex bar.
18 : 72
Camera pan head · 4 : 1
m 1 · 20° · straight, AGMA 2005 proportions
A 4 : 1 right-angle drive for a motorised pan head or turntable.
16 : 24
RC differential · spider and side gear
m 1 · 20° · straight, AGMA 2005 proportions
The pair inside an open differential: a 16-tooth spider gear on a 24-tooth side gear.
16 : 47
RC axle · 16 : 47 ring and pinion
m 1.5 · 20° · straight, AGMA 2005 proportions
A straight-cut ring and pinion for a 1/10 crawler axle, about 2.9 : 1.
20 : 40
2 : 1 · module 4, splined gear
m 4 · 20° · straight, Gleason proportions
A heavy 2 : 1: keyed pinion, ISO 14 6 × 23 × 26 spline in the gear.
20 : 20
60° shaft angle · 1 : 1
m 1.5 · 20° · straight, AGMA 2005 proportions
Two 20-tooth gears meeting at 60°, not 90°.
20 : 30
120° shaft angle · 1.5 : 1
m 1.5 · 20° · straight, AGMA 2005 proportions
An obtuse 120° drive: the gear's cone opens almost flat.
20 : 40
45° shaft angle · 2 : 1
m 1.5 · 20° · straight, AGMA 2005 proportions
A 45° drive for angled outputs and dividers.
16 : 32
2 : 1 · 10 DP, keyed
10 DP · 20° · straight, AGMA 2005 proportions
An inch pair: 10 DP, ½" keyed pinion, ¾" keyed gear.
20 : 20
Miter pair · 24 DP, ¼" bores
24 DP · 20° · straight, AGMA 2005 proportions
Small inch miters: 24 DP, 20 teeth, ¼" bores.
Designing is free; the STL, drawings and STEP download from the app for tokens. STEP is ready for the straight pairs; for the spiral and hypoid pairs it follows. Each pair was checked in the Bevel Gear Designer and opens with no warnings.