蜗轮蜗杆减速机主要由两个部件构成：蜗杆（输入轴）和蜗轮（输出齿轮）。蜗杆外形酷似螺钉，即一根轴上缠绕着一条或多条螺旋状的螺纹。蜗轮则是一种带齿的齿轮，其齿形设计用于与蜗杆螺纹啮合。两者的轴线相互垂直，且通常在同一平面内错开（即交错轴布置）。

当蜗杆旋转时，其螺纹与蜗轮的轮齿啮合，使蜗轮每转动一圈推进一个齿距（以单头蜗杆为例）。因此，减速比等于蜗轮的齿数除以蜗杆的头数（螺纹条数）。例如，由单头蜗杆驱动的40齿蜗轮可实现40:1的减速比；而由双头蜗杆驱动的40齿蜗轮则实现20:1的减速比。

这种接触几何结构的一个关键特征在于，其接触形式几乎完全是滑动接触，这与主要依靠滚动接触工作的直齿轮或斜齿轮截然不同。在整个啮合过程中，蜗杆螺纹在蜗轮齿面上发生滑动。这种滑动会产生摩擦——这既是蜗轮蜗杆减速机一项有用特性（即自锁能力）的来源，也是其主要局限性（即发热和效率损耗）的根源。

蜗轮通常由软质、低摩擦材料（如磷青铜或铝青铜）制成，并与硬化钢制成的蜗杆配合运转。青铜材料在与钢材的配合中充当“牺牲”角色，从而减少了蜗杆（更换成本高昂）的磨损，并提供了实现足够效率所需的低摩擦表面。

The worm gearbox consists of two primary components: the worm (input shaft) and the worm wheel (output gear). The worm resembles a screw — a shaft with one or more helical threads wound around it. The worm wheel is a toothed gear with teeth shaped to mesh with the worm threads. The two axes are perpendicular, typically offset in the same plane (crossed-axis arrangement).

When the worm rotates, its thread engages the teeth of the worm wheel, advancing the wheel by one tooth pitch per worm revolution (for a single-start worm). The speed reduction ratio is therefore equal to the number of teeth on the worm wheel divided by the number of starts (threads) on the worm. A 40-tooth worm wheel driven by a single-start worm gives a 40:1 reduction. A 40-tooth wheel driven by a two-start worm gives 20:1.

The critical characteristic of this contact geometry is that it is almost entirely sliding contact, unlike spur or helical gears which operate predominantly in rolling contact. The worm thread slides across the face of the worm wheel tooth throughout the mesh. This sliding produces friction — which is the source of both the worm gearbox's useful property (self-locking potential) and its primary limitation (heat and efficiency loss).

The worm wheel is almost always made of a soft, low-friction material — typically phosphor bronze or aluminium bronze — running against a hardened steel worm. The bronze sacrifices itself to the steel, reducing wear on the worm (which is expensive to replace) and providing the low-friction surface needed for adequate efficiency.

• 单级减速比高。单级蜗轮蜗杆传动即可实现 5:1 至 70:1 甚至更高的减速比。若使用直齿轮或斜齿轮实现同等减速比，则通常需要两级或三级传动，这会增加成本、系统复杂度和整体长度。

• 紧凑的直角布局。 垂直轴的布置方式非常适合输入轴与输出轴必须呈 90° 角的应用场景（如输送机、闸门驱动装置、起升机构等），无需额外的锥齿轮级或轴装式结构。

• 运行平稳且低噪。与直齿轮相比，蜗轮蜗杆传动采用滑动接触和连续啮合方式，因而噪音更低，扭矩传递更平稳。这一特性在食品加工、包装及对噪音敏感的环境中尤为重要。

• 自锁功能。当导程角较小时，蜗轮蜗杆减速机具有抗反向驱动能力（即输出端无法带动输入端）。这对于需要保持负载位置的应用非常有用（关于自锁功能的具体限制条件，请参阅相关章节）。

• 中小规格成本低。在功率约为 1 kW 以下的规格范围内，蜗轮蜗杆减速机属于成本最低的减速机类型之一。其结构简单且采用标准化设计，有效降低了制造成本。

• 电机直接安装。 大多数现代蜗轮蜗杆减速机均支持直接安装符合 IEC 标准的电机法兰（B5 或 B14），无需联轴器或额外的转接件即可连接电机，从而构成紧凑的齿轮减速电机单元。

• High single-stage reduction ratio. A single worm stage can achieve ratios from 5:1 to 70:1 or higher. Achieving equivalent ratios with spur or helical gears requires two or three stages, each adding cost, complexity, and length.

• Compact right-angle layout. The perpendicular shaft arrangement fits applications where input and output must be at 90° — conveyors, gate drives, lifting mechanisms — without additional bevel stages or shaft-mounted arrangements.

• Quiet and smooth operation. The sliding contact and the continuous tooth engagement produce low noise and smooth torque transmission compared to spur gears. This is valuable in food, packaging, and audio-sensitive environments.

• Self-locking capability. At low lead angles, the worm gearbox resists back-driving — the output cannot drive the input. This is useful for load-holding applications (see self-locking section for important caveats).

• Low cost at small to medium frame sizes. Worm gearboxes are among the lowest-cost gear reducers at sizes below approximately 1 kW. The simple construction and standardised designs keep cost down.

• Direct motor mounting. Most modern worm gearboxes accept IEC-standard motor flanges (B5 or B14) directly, allowing coupling-free motor attachment and compact gearmotors without additional adapters.

关于蜗轮蜗杆减速机的效率，人们往往抱有不真实期望，这种现象比其他任何传动部件的规格参数都要普遍。正确理解效率问题，有助于避免因过热导致的故障以及因热额定值（热容量）不足而引发的问题。

蜗轮蜗杆减速机的效率通常在 50% 到 90% 之间，具体取决于传动比、导程角、润滑油类型及工况。这一效率水平远低于斜齿轮或直齿轮减速机，后者的单级效率通常可达 96%–99%。

影响效率的关键因素包括：

• 传动比（及导程角）。较高的减速比需要较小的蜗杆导程角，而较小的导程角意味着更大的滑动摩擦。例如，传动比为 5:1 的蜗轮蜗杆减速机效率可达 85%–90%，而 60:1 的减速机效率可能仅为 40%–60%。这是影响效率的最重要因素。

• 蜗杆头数。采用多头蜗杆（2、3 或 4 头）可在相同传动比下增大导程角，从而提高效率。例如，由双头蜗杆（配 40 齿蜗轮）实现的 20:1 传动比，其效率要高于由单头蜗杆（配 20 齿蜗轮）实现的 20:1 传动比。

• 润滑油类型。与矿物油相比，合成聚α-烯烃（PAO）或聚亚烷基二醇（PAG）润滑油能显著降低滑动摩擦。将蜗轮蜗杆减速机的润滑油从矿物油更换为合成油，可回收 10%–30% 的摩擦损耗——对于高传动比的减速机而言，这种改进意义重大。

• 运行温度。随着油温升高，粘度下降，这在一定程度上反而能提高效率。然而，一旦超过热极限，润滑油性能会迅速恶化，并加速磨损。

低效率带来的实际后果是：当100 W的电机功率输入到效率为 70% 的蜗轮蜗杆减速机时，会有30 W的功率转化为热量，积聚在减速机壳体上。这些热量必须通过壳体表面散发出去。在连续运行的应用场景中，热额定值（而非机械扭矩额定值）往往成为选择减速机时的主要制约因素。

Worm gearbox efficiency is the subject of more wishful thinking than almost any other drive component specification. Understanding it correctly prevents overheating failures and undersized thermal ratings.

Worm gearbox efficiency ranges from approximately 50% to 90% depending on ratio, lead angle, lubricant, and operating conditions. This is substantially lower than helical or spur gearboxes, which typically achieve 96–99% efficiency per stage.

The key drivers of efficiency are:

• Ratio (and lead angle). Higher reduction ratios require lower lead angles on the worm. Lower lead angles mean more sliding friction. A 5:1 worm gearbox may achieve 85–90% efficiency. A 60:1 unit may only achieve 40–60%. This is the single most important factor.

• Number of worm starts. Multi-start worms (2, 3, or 4 starts) increase the lead angle for a given ratio, improving efficiency. A 20:1 ratio from a 2-start worm (40-tooth wheel) is more efficient than a 20:1 from a 1-start worm (20-tooth wheel).

• Lubricant type. Synthetic polyalphaolefin (PAO) or polyalkylene glycol (PAG) oils significantly reduce sliding friction compared to mineral oils. Switching from mineral to synthetic lubricant in a worm gearbox can recover 10–30% of frictional losses — a meaningful improvement on high-ratio units.

• Operating temperature. As oil temperature increases, viscosity drops, which can actually improve efficiency up to a point. However, exceeding thermal limits rapidly degrades the oil and accelerates wear.

The practical consequence of low efficiency: for every 100 W of motor power input to a 70% efficient worm gearbox, 30 W is converted to heat — in the gearbox housing. This heat must be dissipated through the housing surface. On continuous-duty applications, thermal rating — not mechanical torque rating — is often the binding constraint on gearbox selection.

自锁是蜗轮蜗杆减速机的一种特性，即输出端（蜗轮）无法驱动输入端（蜗杆）——即传动是单向的。当蜗杆的导程角足够小时，蜗杆与蜗轮之间的摩擦力会阻止输出端反向带动输入端，从而产生自锁现象。

自锁的条件是：导程角 < arctan(摩擦系数)。在实际应用中，导程角小于约 5° 时，通常在静止状态下会发生自锁；而当导程角超过 8°–10° 时，减速机则能自由反向驱动。

自锁型减速机的效率始终低于 50%——这并非巧合。产生自锁效应的摩擦力，正是导致效率损耗的根源。从定义上讲，自锁型蜗轮蜗杆减速机以热能形式耗散的能量，超过了其作为机械输出所传递的能量。这种关系是根本性的，也是不可避免的。

Self-locking is the property of a worm gearbox where the output (worm wheel) cannot drive the input (worm) — the drive is one-directional. It occurs when the lead angle of the worm is small enough that friction between worm and wheel prevents the output from rotating the input backward.

The condition for self-locking is: lead angle < arctan(coefficient of friction). In practice, a lead angle below approximately 5° will usually self-lock under static conditions. Above 8–10°, the gearbox will back-drive freely.

Self-locking efficiency is always below 50% — this is not a coincidence. The self-locking effect is created by the same friction that causes efficiency losses. A self-locking worm gearbox is, by definition, dissipating more energy as heat than it is transmitting as mechanical output. This relationship is fundamental and inescapable.

⚠️ AGMA 警告：切勿依赖自锁功能作为安全制动手段

美国齿轮制造商协会 (AGMA) 建议，凡涉及负载保持安全要求的场合，均应使用可靠的机械制动器——无论该齿轮箱在理论上是否具备自锁功能。

原因在于：自锁性能无法绝对保证。即使静态导程角低于自锁临界值，振动也可能导致摩擦系数瞬间降低，进而使齿轮箱在负载作用下发生反向蠕动。Eng-Tips 工程论坛记录了多起此类实际故障案例：一些机械设计人员误以为蜗轮蜗杆减速机能保持负载，结果设备在受到附近机械产生的持续振动时，负载发生了缓慢蠕动。

Boston Gear 明确指出：“如果自锁式减速机受到冲击载荷或振动，该装置可能会发生反向驱动。”如果应用场景需要安全保持负载（例如起重机、闸门执行器、垂直升降机，或任何意外移动可能带来危险的场合），请务必安装一个独立于齿轮箱之外的可靠制动器。

⚠️ AGMA warning: never rely on self-locking as a safety brake

The American Gear Manufacturers Association (AGMA) recommends that a positive mechanical brake should always be used when load-holding is a safety requirement — regardless of whether the gearbox is theoretically self-locking.

The reason: self-locking is not guaranteed. Even when the static lead angle is below the self-locking threshold, vibration can momentarily reduce the friction coefficient, and the gearbox will creep backward under load. Eng-Tips engineering forums document multiple real-world failures of this type — machinery designers who assumed the worm gearbox would hold a load found it slowly creeping under sustained vibration from nearby equipment.

Boston Gear states explicitly: "If a self-locking reducer is subjected to shock loading or vibration, the unit may back drive." If your application requires a load to be held safely — hoists, gate actuators, vertical lifts, anything where unexpected movement is a hazard — fit a positive brake independent of the gearbox.

对于导程角（lead angle）大于约 8° 的蜗轮蜗杆减速机而言，反向驱动不仅可能发生，而且属于正常现象。当电机停止运转时，输出端的负载可能会反向驱动蜗杆，导致被驱动部件发生惯性滑行或自由滑移。这并非缺陷，而是中高效率、非自锁型蜗轮蜗杆减速机的预期工作特性。

工程技术论坛上经常讨论“惯性滑行问题”：设计人员在选型时，往往因“蜗轮蜗杆减速机具有自锁功能”这一固有印象而认为其能保持负载，但在设备调试时却发现电机停止后输出端仍在继续运动。其根本原因在于选用了高效率传动比（例如采用多头蜗杆实现的 20:1 或 30:1 速比），却未核查导程角。

若应用场景要求保持负载且首选蜗轮蜗杆减速机，请遵循以下建议：

• 选用单头蜗杆并配置足够高的速比，以确保较低的导程角（通常速比需达到 40:1 或更高，才能具备可靠的自锁倾向）。

• 即使满足上述条件，对于任何涉及安全关键的应用，仍应加装可靠的电机制动器。

• 对于非安全关键应用，若惯性滑行虽不构成危险但不符合使用要求，可在输出轴上安装盘式制动器或逆止器作为切实可行的解决方案。

For worm gearboxes with lead angles above approximately 8°, back-driving is not only possible — it is normal. When the motor is stopped, the output load can drive the worm backward, causing the driven component to coast or run down freely. This is not a defect. It is the expected behaviour of a non-self-locking worm gearbox at moderate-to-high efficiency.

The "coasting problem" is documented extensively in engineering forums: designers select a worm gearbox assuming it will hold a load (because it is a worm gearbox and "worm gearboxes self-lock"), commission the machine, and find the output continues to move after the motor stops. The root cause is selecting a high-efficiency ratio (say 20:1 or 30:1 from a multi-start worm) without checking the lead angle.

If load-holding is required and a worm gearbox is the preferred drive:

• Specify a single-start worm with a sufficiently high ratio to ensure a low lead angle (generally 40:1 or higher for reliable self-locking tendency).

• Even then, fit a positive motor brake for any safety-critical application.

• For non-safety-critical applications where coasting is undesirable but not dangerous, a disc brake or backstop on the output shaft is a practical solution.

蜗轮蜗杆减速机在标称参数时，往往机械扭矩容量标得过高，而热容量却标得偏低。这会导致减速机虽然在机械结构上能长期传递所需扭矩，但在连续运行中却因机壳无法散发内部摩擦产生的热量而过热。

每份蜗轮蜗杆减速机产品目录都会列出机械扭矩额定值和热功率额定值（有时称为热许用功率）。对于高传动比且连续运行的机型，其热功率额定值往往低于额定转速下的机械扭矩额定值。因此，务必同时核查这两个参数。

例如：一台传动比为 60:1、机械输出扭矩额定值为 500 Nm 的蜗轮蜗杆减速机，其连续热功率额定值可能仅为 0.75 kW。若配套 1450 rpm 的电机，在 60:1 的传动比下，输出转速约为 24 rpm。此时输出功率 = 500 Nm × 24 rpm × (2π/60) ≈ 1.26 kW。该数值超过了热额定值——这意味着若按机械扭矩极限连续运行，减速机会发生过热。

当热额定值成为制约因素时的应对方案：

• 降低工作周期（占空比）。采用间歇性运行并留有停机冷却时间，可使机壳散热。热额定值通常针对连续运行工况设定；对于短时工作制应用，往往可以在不发生过热的情况下充分利用机械扭矩。

• 增加强制冷却。在减速机机壳上加装外部风扇（许多供应商提供此选项）可显著提高热额定值，通常增幅可达 30%–50%。

• 使用合成润滑油。使用 PAO 或 PAG 油可降低摩擦，从而减少发热，有效提升热容量。

• 增大机座尺寸。机壳尺寸越大，表面积也越大，散热能力越强。改用大一号的机座通常能解决热容量不足的问题，且无需更改传动比或电机规格。

• 选用两级斜齿轮-锥齿轮减速机。如果无法在蜗轮蜗杆减速机系列内经济地解决热容量限制问题，可考虑改用效率更高的齿轮传动类型，以适应应用需求。

Worm gearboxes are frequently over-rated on mechanical torque capacity and under-rated on thermal capacity. The consequence is a gearbox that can mechanically transmit the required torque indefinitely but overheats in continuous service because its housing cannot dissipate the heat generated by internal friction.

Every worm gearbox catalogue includes both a mechanical torque rating and a thermal power rating (sometimes called the thermally permissible power). On high-ratio units running at continuous duty, the thermal rating is frequently lower than the mechanical torque rating at rated speed. Always check both.

For example: a worm gearbox rated at 500 Nm mechanical output torque at 60:1 ratio may have a thermal power rating of only 0.75 kW continuous. At 60:1 from a 1,450 rpm motor, the output speed is approximately 24 rpm. Power at the output = 500 Nm × 24 rpm × (2π/60) ≈ 1.26 kW. This exceeds the thermal rating — the gearbox will overheat in continuous service at its mechanical torque limit.

Options when thermal rating is the binding constraint:

• Reduce duty cycle. Intermittent operation with rest periods allows the housing to cool. Thermal rating is specified for continuous duty — short-duty applications can often use the full mechanical torque without overheating.

• Add forced cooling. An external fan on the gearbox housing (many suppliers offer this option) significantly increases the thermal rating — typically by 30–50%.

• Use synthetic lubricant. The friction reduction from PAO or PAG oil reduces heat generation, effectively increasing thermal capacity.

• Step up the frame size. A larger housing with more surface area dissipates more heat. Moving to the next frame size often resolves the thermal constraint without changing ratio or motor size.

• Use a two-stage helical-bevel gearbox. If the thermal constraint cannot be resolved economically within the worm gearbox family, consider whether a more efficient gear type is the right solution for the application.

选择减速机速比时，需要掌握三个参数：电机转速、所需输出转速以及所需输出扭矩。根据电机转速和输出转速，速比计算如下：

速比 = 电机转速 (rpm) ÷ 输出转速 (rpm)

例如：电机转速为 1,450 rpm，所需输出转速为 29 rpm → 速比 = 1,450 ÷ 29 = 50（选择 50:1）。

随后，通过以下公式确定输出扭矩：

输出扭矩 (Nm) = 电机扭矩 (Nm) × 速比 × 效率

在计算扭矩时，务必计入效率因素。以一台效率为 55% 的 60:1 蜗轮蜗杆减速机为例，若输入扭矩为 10 Nm，则输出扭矩 = 10 × 60 × 0.55 = 330 Nm，而非简单速比计算得出的 600 Nm。这 270 Nm 的差值即转化为减速机内部的热能。

对于涉及冲击载荷、循环载荷或反向运行的应用场景，在选择减速机之前，需对所需扭矩应用“使用系数”（Service Factor）。典型使用系数如下：均匀载荷为 1.0，中度冲击为 1.25–1.50，重度冲击为 1.75–2.0。将计算出的输出扭矩乘以使用系数，并选择额定值高于该数值的减速机。

Selecting the gearbox ratio requires knowing three things: motor speed, required output speed, and required output torque. From motor speed and output speed, the ratio is:

Ratio = Motor speed (rpm) ÷ Output speed (rpm)

For example: motor at 1,450 rpm, required output at 29 rpm → ratio = 1,450 ÷ 29 = 50 (select 50:1).

Output torque is then confirmed by:

Output torque (Nm) = Motor torque (Nm) × Ratio × Efficiency

Always include efficiency in the torque calculation. A 60:1 worm gearbox at 55% efficiency from a 10 Nm motor: output torque = 10 × 60 × 0.55 = 330 Nm — not 600 Nm as a simple ratio calculation would suggest. The 270 Nm difference is heat in the gearbox.

For applications with shock loads, cyclic loading, or reversing operation, apply a service factor to the required torque before selecting the gearbox. Typical service factors: uniform load 1.0, moderate shock 1.25–1.50, heavy shock 1.75–2.0. Multiply the calculated output torque by the service factor and select a gearbox rated above this figure.

下表列出的速比是大多数蜗轮蜗杆减速机供应商提供的标准目录产品。非标准速比也可订购，但交货周期较长且价格较高。

The following ratios are available from most worm gearbox suppliers as standard catalogue items. Non-standard ratios can be obtained but carry extended lead times and cost premiums.

效率数据仅供参考——实际数值取决于机座号、润滑剂、温度及负载。请务必查阅所选具体型号的制造商数据进行确认。

Efficiency figures are indicative only — actual values depend on frame size, lubricant, temperature, and load. Always confirm with the manufacturer's data for the specific unit selected.

在直角传动应用中，蜗轮蜗杆减速机主要与斜齿轮-锥齿轮（或称锥齿轮-斜齿轮）减速机形成竞争。了解两者的权衡利弊，有助于避免以下错误：一是在需要斜齿轮-锥齿轮减速机时误选了蜗轮蜗杆减速机；二是过度设计，即在蜗轮蜗杆减速机完全能满足需求的情况下，却选用了斜齿轮-锥齿轮减速机。

Worm gearboxes compete primarily against helical-bevel (bevel-helical) gearboxes for right-angle drive applications. Understanding the trade-offs avoids both the mistake of specifying a worm where a helical-bevel is necessary and the opposite mistake of over-engineering with helical-bevel where a worm is entirely adequate.

在以下情况下选择蜗轮蜗杆减速机：应用属于低至中等负载循环；需要保持负载或具备自锁特性；空间受限且紧凑的直角布局至关重要；传动比超过 20:1 且优先考虑单级传动；或者成本是主要考量因素，而长期运行效率相对次要。

在以下情况下选择斜齿轮-锥齿轮减速机：应用涉及连续重载工况（如全天候运行的输送机、搅拌机、挤出机）；高效率至关重要（涉及能源成本或热负荷限制）；要求长使用寿命且维护需求极低；或者输出扭矩较大，导致蜗轮青铜材质的磨损成为隐患。

Choose a worm gearbox when: the application is low-to-medium duty cycle, load-holding or self-locking tendency is useful, space is constrained and the right-angle compact layout is critical, the ratio required is above 20:1 and single-stage is preferred, or cost is the primary driver and long-term running efficiency is less important.

Choose a helical-bevel gearbox when: the application is continuous heavy duty (conveyors, mixers, extruders running 24/7), high efficiency is important (energy costs or heat budget), long service life with minimal maintenance is required, or output torque is high enough that worm wheel bronze wear becomes a concern.

对于蜗轮蜗杆减速机而言，正确的润滑比大多数其他类型的齿轮传动更为关键，因为其滑动接触产生的热量与磨损直接取决于润滑油膜的质量。

润滑油类型

大多数蜗轮蜗杆减速机制造商指定使用蜗轮专用油（矿物油，ISO VG 220 或 460）或合成 PAO/PAG 油。对于高传动比或连续运行的应用工况，强烈建议使用合成油：

• 合成 PAO（聚α-烯烃）：与大多数密封材料兼容，高温性能优于矿物油，且能显著提高传动效率。

• 合成 PAG（聚亚烷基二醇）：蜗轮蜗杆减速机性能最佳的润滑油——PAG 油对青铜表面具有更强的亲和力，能提供卓越的减摩效果。在高传动比蜗轮蜗杆减速机中，PAG 油可比矿物油提高 10%–30% 的效率。注意：PAG 油与某些密封材料不兼容，使用前须核对减速机制造商的规格要求。此外，PAG 油与矿物油不互溶——在更换油品前，必须彻底排空并冲洗系统。

润滑油量与油位

蜗轮减速机针对不同的安装方位，配有相应的注油量。油位至关重要：油量过少会导致啮合部位润滑不足；油量过多则会引起搅油损失及过热。大多数减速机都配有油位塞和放油塞。注油时务必加注至油位塞高度，切勿仅凭体积估算；此外，在注油前应确认减速机已处于实际安装方位。

换油周期

矿物油：首次换油在运行 200–500 小时后进行（旨在冲洗掉青铜蜗轮磨合产生的碎屑），此后每 2,500–5,000 小时或每年更换一次，以先到者为准。合成油：首次换油在运行 500 小时后进行，此后每 8,000–10,000 小时更换一次，或按制造商规定的周期执行。高温运行会缩短换油周期——若壳体表面温度经常超过 70°C，则应将换油周期缩短一半。

Correct lubrication is more critical in worm gearboxes than in most other gear types because the sliding contact produces heat and wear that is directly controlled by the lubricant film quality.

Oil type

Most worm gearbox manufacturers specify either a worm gear oil (mineral, ISO VG 220 or 460) or a synthetic PAO or PAG oil. Synthetic oils are strongly preferred for higher-ratio or continuous-duty applications:

• Synthetic PAO (polyalphaolefin): Compatible with most seal materials, better than mineral oil at high temperatures, provides measurable efficiency improvement over mineral oil.

• Synthetic PAG (polyalkylene glycol): The highest-performing lubricant for worm gearboxes — PAG oils have a higher affinity for bronze surfaces and provide superior friction reduction. PAG oils can improve efficiency by 10–30% over mineral oil in high-ratio worm gearboxes. Note: PAG oils are not compatible with some seal materials and require verification against the gearbox manufacturer's specification. They are also not miscible with mineral oil — drain and flush thoroughly before converting.

Oil quantity and level

Worm gearboxes are supplied with specific oil fill quantities for each mounting orientation. The oil level is critical — too little starves the mesh; too much causes churning losses and overheating. Most units have a level plug and a drain plug. Always fill to the level plug, not by volume estimate, and confirm the gearbox is in its installed orientation before filling.

Oil change interval

Mineral oil: first change at 200–500 hours (to flush running-in debris from the bronze wheel), then every 2,500–5,000 hours or annually, whichever is sooner. Synthetic oil: first change at 500 hours, then every 8,000–10,000 hours or per manufacturer specification. High-temperature operation shortens intervals — halve the interval if the housing regularly runs above 70°C surface temperature.

蜗轮蜗杆减速机提供多种安装配置：

• 底脚安装（底座安装）：壳体上设有四个安装脚，可将减速机用螺栓固定在平坦底座上。这是地面或框架安装式驱动装置最常见的配置。

• 法兰安装：输出端面设有加工过的法兰，可直接安装到机器结构上或进行穿板式安装。常见于包装和分度应用。

• 电机法兰接口（B5/B14）：壳体输入端经过加工，可直接连接标准的 IEC 电机法兰。电机轴与蜗杆轴直接耦合，无需联轴器或单独的适配器。由此构成的减速电机结构紧凑，且消除了对中问题。

• 空心轴输出：输出端为中空孔，可直接套在被驱动轴上。常用于输送机和辊道驱动装置，减速机直接安装在其驱动的轴上。

安装方位会影响油位——若减速机的输入轴垂直安装而非水平安装，则需要不同的注油量以确保正确润滑。订购时务必与制造商确认安装方位，并遵循安装手册中的安装方位注油量对照表。

Worm gearboxes are available in multiple mounting configurations:

• Foot mount (base mount): Four mounting feet on the housing allow the gearbox to be bolted to a flat base. The most common configuration for floor or frame-mounted drives.

• Flange mount: A machined flange on the output face allows direct mounting to a machine structure or through-plate installation. Common in packaging and indexing applications.

• Motor face (B5/B14): The input end of the housing is machined to accept standard IEC motor flanges directly. The motor shaft couples directly to the worm shaft — no coupling or separate adapter needed. The resulting gearmotor is compact and eliminates alignment issues.

• Hollow bore output: The output is a hollow bore that slides directly over a driven shaft. Used on conveyor drives and roller drives where the gearbox mounts directly on the shaft it is driving.

Mounting orientation affects oil level — a gearbox mounted with the input shaft vertical rather than horizontal requires a different oil quantity for correct lubrication. Always confirm mounting orientation with the manufacturer when ordering, and follow the mounting-orientation oil fill table in the installation manual.

对于需要直角布局、结构紧凑、效率要求适中且可能需要高传动比的各类工业应用，蜗轮减速机是理想的解决方案，也是最具经济效益的选择：

• 输送设备：适用于低至中等速度及工作周期的带式、板式和辊道输送机。其紧凑的结构便于将减速机安装在空间有限的输送机框架内。

• 包装机械：包括薄膜缠绕、纸箱封口、贴标及分度转台等设备。蜗轮传动能提供生产环境所需的平稳、低噪运行；在高传动比下，其自锁特性对于需要在工作循环间保持位置的分度机构尤为有利。

• 闸门与阀门执行机构：适用于灌溉闸门、大坝闸门、水闸阀及管道阀门。其自锁特性（配合强制制动器使用）可防止闸门在水力或重力负载下发生位移。

• 物料搬运与起重设备：包括手动或电动葫芦、千斤顶及升降平台等需要受控慢速移动和负载保持能力的设备。务必使用强制制动器，切勿仅依赖自锁功能来确保安全。

• 混合与搅拌设备：适用于食品、化工及水处理行业的混合搅拌设备，这些场合通常要求低输出转速、高扭矩及低噪音运行。

• 螺旋升降机：蜗轮丝杆升降机将电机的旋转输入转换为直线升降运动。该装置具有极高的机械优势，且因采用较小的导程角而具备固有的自锁特性。

• 农业机械：包括撒肥机、播种机及动力输出轴（PTO）驱动的农具等；这些设备利用蜗轮传动在紧凑的壳体内实现变速和直角传动。

Worm gearboxes are the correct solution across a broad range of industrial applications where the combination of right-angle layout, compact size, moderate efficiency requirements, and potentially high ratio makes them the most economical choice:

• Conveyors: Belt, slat, and roller conveyors at low-to-moderate speed and duty cycle. The compact footprint allows gearboxes to be mounted in tight conveyor frames.

• Packaging machinery: Film wrapping, case sealing, labelling, and indexing turntables. Worm drives provide the smooth, quiet motion needed in production environments, and the self-locking tendency at higher ratios is useful for indexing mechanisms that must hold position between cycles.

• Gate and valve actuators: Irrigation gates, dam gates, sluice valves, and pipeline valves. The self-locking property (with positive brake) prevents gates from drifting under hydraulic or gravity load.

• Material handling lifting equipment: Manual or motorised hoists, jacks, and lifting platforms where controlled, slow movement and load-holding capability are needed. Always use a positive brake — do not rely on self-locking alone for safety.

• Mixers and agitators: Food, chemical, and water treatment mixers where low output speed, high torque, and quiet operation are required.

• Screw jacks: Worm gear screw jacks convert rotational motor input into linear lifting motion. The mechanical advantage is extreme and self-locking is inherent at the low lead angles used.

• Agricultural machinery: Spreaders, seed drills, and PTO-driven implements that use worm drives for ratio and right-angle transmission in compact housings.