BWD 旋风减速机 – 卧式底座安装齿轮箱

The BWD series cyclo gear reducer delivers ratio ranges from 1:9 to 1:87 in a single-stage horizontal foot-mounted configuration. Designed as a direct replacement for Sumitomo CHHM and SM-Cyclo models, this unit features cast iron housing, GCr15 bearing steel internals, and output torque up to 29,400 N.m. Available in frame sizes 09 through 18, the BWD cycloidal speed reducer fits conveyors, mixers, and general industrial drives across Korean manufacturing facilities. Contact Korea Ever-Power for specifications, pricing, and same-week dispatch on standard models.

类别：旋翼齿轮减速器

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描述
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Product Overview

一个 旋翼齿轮减速器 is a type of speed reduction device that uses an eccentric bearing to drive a cycloidal disc, producing high torque output at reduced rotational speeds through rolling contact between the disc and a ring of pins. The BWD series represents the single-stage, horizontal foot-mounted configuration within this product family, and it is one of the most widely installed 摆线齿轮减速器 types across Korean and East Asian manufacturing plants.

This unit serves as a direct replacement for Sumitomo CHHM and SM-Cyclo equivalent frame sizes. Customers ordering the BWD cyclo gear reducer can cross-reference their existing Sumitomo frame numbers to find a matching Ever-Power unit with identical shaft dimensions, mounting bolt patterns, and center heights. This cross-referencing is provided solely for customer convenience in selecting the correct replacement unit, and does not imply the sale of counterfeit goods or any affiliation with the referenced brand.

BWD 旋风减速器 1

The BWD series covers frame sizes 09 through 18, with center heights ranging from 80 mm to 420 mm. Output shaft diameters span from 22 mm (Frame 09) up to 140 mm (Frame 18), and the housing is precision-machined cast iron for long-term dimensional stability. Input power ratings range from fractional kilowatt motors up to 55 kW, making this horizontal foot-mounted cycloid reducer suitable for light-duty packaging lines as well as heavy-duty aggregate conveyors. Industries that regularly specify this model include cement processing, wastewater treatment, food production, textile manufacturing, and port logistics across South Korea, Japan, and Southeast Asia. View all available models in the 旋翼齿轮减速器 series.

Every BWD unit ships with a standard oil-bath lubrication system, four-bolt foot mounting pads, and keyed input and output shafts machined to h6 tolerance. Optional configurations include a double output shaft variant, a flange-mount adapter kit, and custom RAL color painting for facility standardization.

Technical Specifications and Dimensional Data

The tables below present the complete installation and shaft-end dimensions for all BWD cycloidal speed reducer frame sizes. When selecting a frame, pay close attention to the center height (which determines alignment with your driven equipment), the output shaft diameter d1 and keyway width b1 (which must match your coupling or sprocket bore), and the mounting bolt hole spacing A1 and B1. All dimensions are in millimeters. Shaft tolerances are machined to h6 for the output side and js6 or k6 for specific configurations as noted in the second table.

BWD 旋风齿轮减速器尺寸 1

Table 1: Appearance and Installation Dimensions (mm)

Frame	中心高度	Installation Dimension								Shaft End Dimension
		一个₁	一个₀	B₁	B₀	h	s	Hole		Output Shaft				Input Shaft
		一个₁	一个₀	B₁	B₀	h	s	n	d₀	d₁	b₁	c₁	l₁	d₂	b₂	c₂	l₂
09	80	17	76	30	120	12	M8	4	11	22	6	24.5	30	15	5	17	25
10	100	58	90	35	150	14	M8	4	11	30	8	33	35	15	5	17	22
11	120	69	110	55	240	16	M8	4	16	35	10	38	56	18	6	20.5	35
12	140	73	150	60	280	20	M10	4	16	45	14	48.5	71	22	6	24.5	40
13	160	78	200	75	340	25	M12	4	17	55	16	59	80	30	8	33	55
14	200	53	320	90	340	25	M12	4	22	70	20	74.5	102	35	10	38	60
15	240	39	380	420	420	32	M16	4	22	90	25	95	120	45	14	48.5	70
16	290	45	480	80	560	35	M20	4	26	100	28	106	140	50	14	53.5	82
17	325	80	500	120	630	40	M20	4	30	120	32	127	165	55	16	59	100
18	420	122	330x2	160	800	50	2-M20	6	32	140	36	148	210	70	20	74.5	120

Note: Matching tolerance of shaft d₁/d₂ is h6.

Configuration Drawing - Single Stage Horizontal Type

BWD 旋风齿轮减速器尺寸 2

Table 2: BWD/BW Contour and Installation Dimensions (mm)

Frame	Contour Dimensions (mm)							Installation Dimensions (mm)										Shaft End Size (mm)
Frame	M	W	Z1	Z2	我	X	JV	P	E	R	F	问	T	S	N	G	H	B	T	D	L	b	c	d	r
10	110	140	182	129	114	127	Per motor	80	74	35	12	115	36	M4	4	11	80	6	20.5	18js6	28	5	16	14js6	25
12	120	185	215	165	190	168		90	93	-	15	150	35	M8	4	11	100	8	33	30js6	35	5	17	15js6	22
15	160	250	262	200	260	210		120	120	-	18	210	50	M8	4	15	120	10	38.5	35k6	56	6	22.5	20js6	30
18	230	290	335	260	300	245		180	125	-	20	240	60	M8	4	15	140	14	49	45k6	75	8	28	25js6	40
22	280	330	393	311	350	290		220	155	-	20	290	65	M10	4	17	160	16	60	55k6	90	8	33	30js6	45
27	380	400	462	359	430	350		320	153	65	25	340	70	M12	4	22	200	20	76	70米6	100	10	38.5	35k6	60
33	440	470	545	432	520	420		380	155	100	32	420	80	M16	4	22	240	24	97	90米6	116	14	49	45k6	70
39	520	560	668	528	605	500		440	200	150	35	500	90	M20	4	26	280	28	108	100m6	140	16	55	50k6	80
45	600	690	783	594	706	580		500	245	150	45	630	105	M24	4	28	325	28	116	110米6	165	16	60	66k6	82
55	810	880	966	733	880	735		330x2	322	-	50	800	140	M33	6	36	420	36	140	130m6	200	20	76	70k6	105
65	900	1030	1120	-	1008	855		375x2	354	-	55	920	170	M36	6	40	490	40	171	150m6	240	24	87	80k6	130

How a Cycloidal Speed Reducer Works

The BWD horizontal foot-mounted cyclo drive reducer operates on an eccentric input principle rather than conventional involute gear meshing. The motor-driven input shaft carries an eccentric bearing, which causes a cycloidal disc (sometimes called a cycloid gear) to orbit inside a fixed ring of pins mounted to the housing. As the disc orbits, its lobed profile maintains rolling contact with each pin in sequence. Because the disc has one fewer lobe than the ring has pins, each full revolution of the input shaft advances the disc by exactly one pin position relative to the housing.

This small angular advance per input revolution is what produces the high reduction ratio. For a disc with 20 lobes and a ring with 21 pins, the single-stage ratio is 1:20. The output shaft connects to the cycloidal disc through a set of output rollers fitted into holes on the disc, converting the disc's wobbling orbital motion into smooth concentric rotation. Because nearly half of the pins are in contact with the disc at any given moment (compared to only one or two teeth meshing in a spur gear train), the load is distributed across many contact points simultaneously. This results in significantly higher shock load capacity and a much longer fatigue life for the internal components.

Key engineering point: The rolling contact between the cycloidal disc and pins generates far less friction heat than the sliding contact in worm gear sets. This is the primary reason a BWD cyclo gear reducer maintains 85-92% efficiency at rated load, while worm reducers with comparable ratios typically operate between 40-70%.

The BWD housing also incorporates a two-stage sealing system at both shaft exits: an inner oil seal retains lubricant, and an outer dust lip prevents abrasive particles from entering the bearing area. For the horizontal foot-mounted configuration, lubrication is handled by an oil bath, with the oil level visible through a sight glass on the housing side. The breather cap on top equalizes internal pressure during temperature changes. When the output connects to a chain-driven conveyor, matching 链轮和链条 must be sized to handle the reducer output torque.

Cyclo Gear Reducer vs Worm Gear Reducer: An Engineering Comparison

Both cycloidal and worm gear reducers can deliver high reduction ratios in a single stage. However, their internal mechanisms produce very different performance characteristics. A 蜗轮减速器 transmits power through sliding contact between a helical worm screw and a bronze wheel, while a horizontal foot-mounted 旋翼齿轮减速器 like the BWD uses rolling contact between a cycloidal disc and hardened steel pins. This fundamental difference in contact mechanics drives most of the performance gaps outlined below.

Comparison Factor	Cyclo Gear Reducer (BWD)	蜗轮减速器
Transmission Efficiency	85-92%	40-85% (ratio dependent)
Single Stage Ratio Range	1:9 to 1:87	1:5 to 1:100
Contact Type	Rolling (low friction)	Sliding (high friction)
Heat Generation	低的	High (especially at high ratios)
Shock/Overload Tolerance	最高可达 500% 瞬时过载	Limited (bronze wheel damage)
Self-Locking Capability	No (requires brake)	Yes (at ratios above ~1:30)
典型使用寿命	10-20 years (rolling fatigue)	5-10 years (wear dependent)
Noise Level at Rated Load	60-75 dB(A)	55-70 dB(A)
Backdriveability	Freely backdriveable	Non-backdriveable at high ratios

The efficiency difference is the most consequential factor for facilities running drives around the clock. A worm reducer operating at a 1:60 ratio typically achieves around 55-65% efficiency, meaning 35-45% of motor energy converts to heat rather than useful output torque. The same 1:60 ratio in a cycloidal unit runs at roughly 87% efficiency, reducing wasted energy by more than half. Over a three-year period on a 15 kW motor running two shifts per day, this efficiency gap translates to meaningful electricity cost savings, often enough to offset the initial price difference between the two reducer types.

The one area where worm reducers hold a clear advantage is self-locking. At ratios above approximately 1:30, a worm set cannot be backdriven through the output shaft, which provides a built-in holding function for vertical lifting applications. A cycloidal pinwheel reducer does not self-lock and will require a separate brake or holding device if the load must remain stationary when power is removed. For horizontal conveyor drives, crane travel mechanisms, and mixer agitators where self-locking is not required, the cycloidal option delivers better efficiency and longer service intervals. For applications that need both high ratio and positioning accuracy, a planetary gearbox may also be worth evaluating.

Selection and Sizing Guide for BWD Cyclo Reducers

Selecting the correct BWD cyclo gear reducer frame size requires four primary parameters from the application. Gathering these before contacting our engineering team will speed up the quotation process and reduce the risk of mis-sizing.

Required output torque (N.m) or the load weight and radius for lifting/conveying applications
Required output speed (rpm) or the desired reduction ratio
Motor power (kW) and motor speed (typically 1500 rpm 4-pole or 960 rpm 6-pole in Korea)
Mounting orientation: horizontal foot, vertical flange, or double-shaft through-drive

Torque Calculation Method

The basic output torque formula for any speed reducer is: T_出去 = (P x 9550 xix η) / n_在, where P is motor power in kW, i is the reduction ratio, η is the efficiency (use 0.87 for single-stage cyclo), and n_在 is motor input speed in rpm. For example, a 7.5 kW motor at 1500 rpm driving a BWD frame with a 1:43 ratio produces approximately: (7.5 x 9550 x 43 x 0.87) / 1500 = 1,785 N.m at the output shaft.

Environmental and Installation Considerations

Beyond torque and speed, also confirm: the ambient temperature range (standard lubricant suits -10 to +40 degrees Celsius; extreme temperatures require special oil grades), whether the unit operates continuously or in start-stop cycles (service factor adjustment), the presence of corrosive or dusty atmospheres (optional enhanced sealing or surface coating), and the maximum allowable radial and axial loads on the output shaft (if coupling or sprocket loads are significant, an outboard bearing support may be needed). If your application requires self-locking capability, a 蜗轮减速器 may be a better fit for that specific requirement. For applications above 18.5 kW input power, we recommend matching the BWD with a 6-pole 960 rpm motor rather than a 4-pole 1500 rpm motor to reduce internal bearing loads and extend the maintenance interval. The product category page includes ratio selection charts for each frame size.

摆线齿轮减速器工业应用

Core Performance Advantages of the BWD Horizontal Foot-Mounted Cyclo Gear Reducer

► High Torque Density

Output torque from 48.3 N.m to 29,400 N.m across the frame range, with a torque-to-weight ratio that outperforms conventional helical gearboxes of similar capacity by 30-40%.

► Overload Resilience

Multi-tooth contact distributes shock loads across the entire pin ring. Momentary overloads up to 500% of rated torque are absorbed without permanent deformation of the cycloidal disc.

► Extended Service Intervals

Rolling contact generates minimal wear debris. Oil change intervals are 5,000 hours or 6 months for standard duty. Internal components routinely last 10-20 years without replacement.

► Bidirectional Operation

The BWD design permits forward and reverse rotation without modification. This suits reversible conveyor drives, reciprocating actuators, and any process requiring periodic direction changes.

► Compact Footprint

The coaxial input/output arrangement and internal planetary motion keep the housing diameter smaller than an equivalent-ratio helical reducer. Frame 12, for instance, fits within a 200 mm x 320 mm base area while delivering 45 mm output shaft capacity.

Related and Compatible Products

The BWD cyclo gear reducer is one component in a complete power transmission chain. Depending on your application, you may need some of the following complementary products. Korea Ever-Power supplies all of these either from stock or on short lead times, and our engineering team can help you specify the complete drive package.

Power input components: Electric motors (IEC standard frame, three-phase induction) and flexible jaw couplings or pin-and-bush couplings for vibration isolation between the motor and reducer input shaft.

Output-side components: Drive shafts and universal joints for transmitting torque to offset or angular loads, particularly in heavy-duty mixer and kiln applications.

旋翼减速器组合产品-1

Chain transmission: Sprockets and chains for applications where the reducer output connects to a chain-driven conveyor or bucket elevator.

Combined transmission packages: For applications needing very high reduction ratios (above 1:87), the BWD can be connected in series with a planetary gearbox as a pre-stage or post-stage unit. It can also be paired with a worm gear reducer for applications requiring both high ratio and self-locking capability. Contact us for combined drive arrangement drawings.

Frequently Asked Questions

What reduction ratios are available for the BWD horizontal foot-mounted cyclo gear reducer?

The BWD series offers single-stage ratios from 1:9 to 1:87. For ratios above 1:87, a double-stage BWED model or a BWD combined with an external pre-reduction stage can reach ratios up to 1:7,569.

Is a cyclo reducer more efficient than a worm gearbox for conveyor applications?

Yes. At a typical conveyor ratio of 1:30 to 1:50, a cycloidal unit operates at approximately 87% efficiency, while a worm set at the same ratio typically drops to 60-70%. This difference directly reduces your electricity costs and motor heat buildup.

What lubricant should I use for the BWD series?

Standard operating temperatures call for 40# or 50# mechanical oil. For improved wear protection and longer drain intervals, 70# or 90# extreme-pressure gear oil is recommended. Change oil after the first 100 hours of operation, then every 6 months (based on an 8-hour daily work cycle).

Can the BWD handle shock loads from crusher or vibrating screen applications?

The multi-tooth engagement of the cycloidal disc allows momentary peak loads up to 500% of rated torque without damage. For continuous heavy shock duty, select one frame size above the torque calculation result to provide additional safety margin.

What is the maximum tilt angle for horizontal mounting?

The BWD foot-mounted unit should be installed within 15 degrees of horizontal. Beyond that angle, oil-bath lubrication may not reach all bearings properly, and a circulating oil system or alternative lubrication arrangement becomes necessary.

How long does a cycloidal speed reducer typically last in continuous industrial service?

With proper lubrication and within rated load conditions, the internal components of a BWD cyclo reducer have an expected service life of 10 to 20 years. The bearings are typically the first component to require replacement, and they can be changed without scrapping the housing or cycloidal disc.

Can the BWD be paired with a drive shaft for angular connections?

是的。对于输出需要以一定角度传递扭矩的应用，BWD 输出轴通过一个连接点连接。 drive shaft 以及万向节组件。这在搅拌机、窑炉和输送机等应用中很常见。

韩国永动力公司是否提供OEM贴牌或定制轴配置？

是的。我们提供定制输出轴直径、键槽修改、特殊法兰样式、非标准RAL油漆颜色以及OEM铭牌服务。定制配置的最低订购量通常较低，交货周期为2至4周，具体取决于修改范围。