Straight Bevel Gear — module 0.5–4 · planed · 20°

Name: Straight Bevel Gear — module 0.5–4 · planed · 20°
Brand: Wolfer

Specifications · Selector

Straight bevel gear online selector

All 44 standard sizes from the catalogue PDF (supplied in gear + pinion pairs). Filter by module, ratio, teeth or bore — or search by code. All dimensions in mm.

Material 40Cr · Planed teeth · Hardness 45–55 HRC · Straight bevel, supplied in pairs (gear + pinion) · 20° pressure angle · Model code: moduleM-teeth-bore (ratio = gear ratio)

Straight bevel gear construction and designation diagram

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Module

Ratio

Teeth

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Bore A

–

Complete size table · 44 sizes (static version for printing and full-text search)

Straight bevel gear online selector (44)
Model Code	Ratio	Module M	Teeth z	Bore A·H7	Outline B	Pitch Ø C	Tip Ø D	Mount E	Length F	Tip dist G	Hub H	Bore len I	Face J	Backlash mm
M1.5-30	1.5	1.5	30	10	30	45	46.24	28	18.53	13.93	8	16	9	0.05~0.15
M1.5-20	1.5	1.5	20	8	25	30	33.13	33	18.63	11.54	8.83	17	9	0.05~0.15
M2-30	1.5	2	30	10	35	60	61.65	40	26.87	21.24	15	33	11	0.06~0.16
M2-20	1.5	2	20	10	30	40	44.18	45	25.06	16.39	11.67	22	11	0.06~0.16
M2.5-30	1.5	2.5	30	15	45	75	77.07	50	34.22	26.55	18	30	15	0.07~0.17
M2.5-20	1.5	2.5	20	12	35	50	55.22	55	31.06	19.24	12.5	28	15	0.07~0.17
M3-30	1.5	3	30	15	50	90	92.48	55	35.56	26.86	17	31	17	0.08~0.18
M3-20	1.5	3	20	15	45	60	66.27	70	40.48	27.09	20	37	17	0.08~0.18
M4-30	1.5	4	30	20	70	120	123.3	75	47.71	37.48	25	40	20	0.12~0.27
M4-20	1.5	4	20	15	60	80	88.32	90	48.53	32.77	23.33	43	20	0.12~0.27
M5-30	1.5	5	30	25	90	150	154.13	90	58.45	43.14	24	50	30	0.14~0.34
M5-20	1.5	5	20	20	80	100	110.45	110	62.11	38.48	28.33	56	30	0.14~0.34
M1.5-30	2	1.5	30	8	25	45	45.88	25	17.85	14.63	9	15	8	0.05~0.15
M1.5-15	2	1.5	15	6	16	22.5	26.11	32	17.23	10.4	7.88	16	8	0.05~0.15
M2-30	2	2	30	14	30	60	61.17	31	21.6	17.17	10	18	11	0.06~0.16
M2-15	2	2	15	8	22	30	34.81	40	20.59	11.2	8	19	11	0.06~0.16
M2.5-30	2	2.5	30	15	40	75	76.46	40	28.75	22.71	15	24	15	0.07~0.17
M2.5-15	2	2.5	15	12	30	37.5	43.51	55	31.81	19	15.63	29	15	0.07~0.17
M3-30	2	3	30	16	50	90	91.76	50	37.31	29.26	18	30	20	0.08~0.18
M3-15	2	3	15	12	35	45	52.22	70	43.88	26.8	22.5	41	20	0.08~0.18
M4-30	2	4	30	20	60	120	122.34	60	42.4	32.34	20	36	25	0.12~0.27
M4-15	2	4	15	16	50	60	69.62	85	48.74	27.41	22.5	46	25	0.12~0.27
M5-30	2	5	30	20	70	150	152.93	75	52.5	40.43	25	48	30	0.14~0.34
M5-15	2	5	15	20	60	75	87.03	100	63.61	38.04	31.25	58	30	0.14~0.34
M2.5-36	2	2.5	36	15	55	90	91.46	43	28.52	21.96	13	24	16	0.07~0.17
M2.5-18	2	2.5	18	12	38	45	51.01	64	34.27	20.5	17.25	32	16	0.07~0.17
M3-36	2	3	36	20	60	108	109.76	52	34.95	26.76	17	30	20	0.08~0.18
M3-18	2	3	18	16	46	54	61.23	75	40.01	22.81	19	37	20	0.08~0.18
M4-36	2	4	36	20	70	144	146.34	72	49	38.34	25	42	26	0.12~0.27
M4-18	2	4	18	20	60	72	81.62	100	52.77	30.41	25	49	26	0.12~0.27
M1-40	2	1	40	8	25	40	40.59	22	15.07	12.59	8	12	6	0.03~0.13
M1-20	2	1	20	6	16	20	22.41	28	13.78	8.6	7	12	6	0.03~0.13
M1.25-40	2	1.25	40	10	32	50	50.73	27	18.54	15.23	10	16	8	0.14~0.34
M1.25-20	2	1.25	20	8	22	25	28.02	36	18.66	11.75	10.25	17	8	0.14~0.34
M1.5-40	2	1.5	40	10	38	60	60.88	35	25.01	20.88	15	22	10	0.05~0.15
M1.5-20	2	1.5	20	8	25	30	33.61	46	25.54	16.9	14.75	24	10	0.05~0.15
M2-40	2	2	40	12	40	80	81.17	45	32.37	26.17	18	27	15	0.06~0.16
M2-20	2	2	20	12	32	40	44.81	60	34.16	21.2	18	32	15	0.06~0.16
M2.5-40	2	2.5	40	15	50	100	101.46	55	39.73	31.46	20	35	20	0.07~0.17
M2.5-20	2	2.5	20	12	40	50	56.01	75	43.78	26.5	22.5	41	20	0.07~0.17
M3-40	2	3	40	20	60	120	121.76	65	45.85	36.85	24	38	22	0.08~0.18
M3-20	2	3	20	16	50	60	67.22	90	50.81	31.76	27.5	47	22	0.08~0.18
M4-40	2	4	40	20	70	160	162.34	80	53.92	42.34	28	45	28	0.12~0.27
M4-20	2	4	20	20	60	80	89.62	120	66.59	42.41	35	62	28	0.12~0.27

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. Bevel gears are supplied in pairs; ratio is the gear ratio. Source: Wolfer straight bevel gear catalogue; the M4-18 pitch-diameter misprint (75) is corrected to 72 via d = m·z. Download PDF catalogue ↗

FAQ

Common questions about this series

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

The table lists 44 standard gear-and-pinion pairs: module 1–5, ratios 1.5:1, 2:1, 15–40 teeth. Bevel gears are always supplied and lapped as matched pairs; other modules, ratios and bores are made to drawing.

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

Bevel gear, module 0.5–4. Straight bevel gear · cut teeth · 20° pressure angle. Supplied in pairs (gear + pinion). Straight bevel gears are the economical choice for right-angle (90°) shafts at low to medium speed: simple to cut and install, with exact ratios. For higher speed, quieter running or heavier loads at the same size, step up to spiral bevel gears.

Straight 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.

Straight 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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