Spiral Bevel Gear — module 0.5–6 · 35° helix · 20°

Name: Spiral Bevel Gear — module 0.5–6 · 35° helix · 20°
Brand: Wolfer

Specifications · Selector

Spiral bevel gear online selector

All 20 standard sizes from the catalogue PDF (paired, hand-specified). Filter by module, ratio, teeth or hand — or search by code. All dimensions in mm.

Material 40Cr · Spiral bevel, 35° spiral angle · Hardness 45–55 HRC · Supplied in pairs, specify hand (R / L) · 20° pressure angle · Model code: moduleM-teeth (ratio = gear ratio)

Spiral bevel gear construction and designation diagram

Model search

Module

Ratio

Hand

Teeth

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Complete size table · 20 sizes (static version for printing and full-text search)

Spiral bevel gear online selector (20)
Model Code	Ratio	Module M	Teeth z	Hand Dir	Bore A·H7	Outline B	Pitch Ø C	Tip Ø D	Mount E	Length F	Tip dist G	Hub H	Bore len l	Face J	Keyway w×d	Backlash mm
M2-30	1.5	2	30	R	20 / 22	40	60	61.36	40	26.8	21.02	14	23	11	6×2.8 / 6×2.8	0.06~0.16
M2-20	1.5	2	20	L	15 / 18	35	40	43.49	45	24.96	16.16	13.33	23	11	5×2.3 / 6×2.8	0.06~0.16
M2.5-30	1.5	2.5	30	R	22 / 25	48	75	76.74	50	33.6	26.31	18	30	14	6×2.8 / 8×3.3	0.07~0.17
M2.5-20	1.5	2.5	20	L	18 / 20	43	50	54.43	55	30.08	18.98	15.17	28	14	6×2.8 / 6×2.8	0.07~0.17
M3-30	1.5	3	30	R	25 / 30	60	90	92.21	60	40.34	31.66	21	36	17	8×3.3 / 8×3.3	0.08~0.18
M3-20	1.5	3	20	L	22 / 25	53	60	65.58	65	35.17	21.86	17	32.5	17	6×2.8 / 8×3.3	0.08~0.18
M4-30	1.5	4	30	R	35 / 40	75	120	122.91	70	43.99	32.18	21	39	23	10×3.3 / 12×3.3	0.12~0.27
M4-20	1.5	4	20	L	30 / 35	70	80	87.34	85	45.53	27.45	21.67	42	23	8×3.3 / 10×3.3	0.12~0.27
M5-30	1.5	5	30	R	35	90	150	153.67	90	58.08	42.75	24	50	30	22×5.4	0.14~0.34
M5-20	1.5	5	20	L	35 / 40	80	100	109.2	110	61.62	38.07	28.33	56	30	10×3.3 / 12×3.3	0.14~0.34
M2-40	2	2	40	R	20 / 22	45	80	81.06	45	31.83	26.06	18	29	14	6×2.8 / 6×2.8	0.06~0.16
M2-20	2	2	20	L	15 / 18	35	40	44.2	55	28.16	16.05	13.75	27	14	5×2.3 / 6×2.8	0.06~0.16
M2.5-40	2	2.5	40	R	25 / 28	55	100	101.29	50	33.35	26.33	16	30	17	8×3.3 / 8×3.3	0.07~0.17
M2.5-20	2	2.5	20	L	20 / 22	43	50	55.12	65	30.01	16.28	13.25	29	17	6×2.8 / 6×2.8	0.07~0.17
M3-40	2	3	40	R	30 / 35	65	120	121.57	60	39.81	31.57	21	35	20	8×3.3 / 10×3.3	0.08~0.18
M3-20	2	3	20	L	22 / 25	53	60	66.03	80	38.9	21.51	18.25	36.5	20	6×2.8 / 8×3.3	0.08~0.18
M4-40	2	4	40	R	30	70	160	162.07	80	53.69	42.07	28	45	28	8×3.3	0.12~0.27
M4-20	2	4	20	L	30 / 35	60	80	88.5	120	66.24	42.12	35	62	28	8×3.3 / 10×3.3	0.12~0.27
M5-40	2	5	40	R	40	100	200	202.54	90	55.02	42.54	26	50	30	12×3.3	0.14~0.34
M5-20	2	5	20	L	40 / 45	80	100	110.45	140	68.48	42.61	35	63	30	12×3.3 / 14×3.8	0.14~0.34

Static copy of the selector data for reference and printing; use the interactive selector above to filter, sort and request a quote. All dimensions in mm; full range and tolerances per the PDF catalogue.

Click a column header to sort. Supplied in pairs; specify hand (R/L). Source: Wolfer spiral bevel gear catalogue. Download PDF catalogue ↗

FAQ

Common questions about this series

Spiral Bevel Gears: what size range does the table cover?

The table lists 20 standard gear-and-pinion pairs: module 2–5, ratios 1.5:1, 2:1, 20–40 teeth. Bevel gears are always supplied and lapped as matched pairs; other modules, ratios and bores are made to drawing.

Spiral Bevel Gears: what is it and when should I use it?

Bevel gear, module 0.5–6. Curved (spiral) bevel gear · helix 35° · 20° pressure angle. Supplied in pairs — specify hand of spiral (R right / L left). Spiral bevel gears have curved teeth with more teeth in mesh, so they run smoother and quieter and carry more load than straight bevel gears — the usual choice for higher-speed, frequently reversing or precision right-angle drives. Specify the hand of spiral (left/right) when ordering; pairs are matched and lapped together.

Spiral Bevel Gears: can I order a size that is not in the table, or just one piece?

Yes. Everything on this page is made to drawing, and the table is only the standard-size subset of the catalogue. Minimum order quantity is one piece — we routinely make single replacement parts for OEMs whose original supplier has discontinued the item. Send a DWG, STEP or PDF drawing (or a sample part): you get a formal quotation within 24 hours after the information is complete, and the first article ships within 30 days of drawing approval, with inspection records.

Spiral Bevel Gears: what do I need to send to get a quote?

Send the drawing or these values: module (or DP), number of teeth, pressure angle, helix angle and hand (for helical), face width, bore with tolerance and keyway, hub dimensions, material and heat treatment, required accuracy class (ISO 1328 / DIN / AGMA / JIS) and quantity. A STEP file plus a 2D drawing with critical tolerances is ideal; a photo of the old part with basic measurements is enough for a first quote.

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