Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

RK bevel gear box-1 stair
2CK bevel gear box-1 stair
SB-1S Bevel Gearbox
KB1S General type-2stair worm gear unit
KB General 1 type-1stair worm gear unit
KB1SD General type-2stair worm gear unit
KB1SP Planet gear type-2 stair
2CK-1S bevel gear box-2 stair
SB Bevel Gearbox
D Worm Gear Operator
AB Worm Gear Operator
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Phone：+86（577）6730 7899
Mobile：+86 195 1816 9569
Fax：+86（577）6738 7099
Email：sales@kaiweixi.com
Address：No. 1 Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province, China
Website：https://www.kaiweixi.com

Gearbox (Worm Gearbox)

Gearbox (Worm Gear) Models: AB / D / SB-V / RK / 2CK / KB A valve gearbox (also known as a valve reduction gearbox, gear operator, or worm gear) is a mechanical device that converts high-speed, low-torque input into low-speed, high-torque output through a gear transmission mechanism. It is primarily used to assist in valve operation under manual or powered drive.The core function of a gearbox (worm gear) is to increase output torque, allowing an operator to easily open or close large-diameter or high-pressure valves that require high torque with relatively low handwheel force. At the same time, through the design of the transmission ratio, the gearbox enables slow and smooth valve movement, avoiding impact damage to the sealing surfaces.Internally, it typically uses a worm gear or spiral bevel gear transmission pair.The worm gear mechanism has a self-locking characteristic (i.e., when the input side stops, the output side cannot be driven in reverse) and is widely used on gate valves, globe valves, butterfly valves, and ball valves.Spiral bevel gears offer higher efficiency and no self-locking, making them suitable for valves that require fast opening and closing.Installation types:Top-mounted: Directly connected to the valve stem.Side-mounted: Offset output to accommodate space constraints.The valve gearboxes produced by Kaivex Valve Group are widely used on large-diameter or high-pressure valves in industries such as petroleum, chemical, electric power, and water treatment. When selecting a gearbox, it is necessary to confirm the valve's torque requirements, transmission ratio, handwheel operating force, and ingress protection rating (e.g., IP65). Some high-end models can be connected to electric or pneumatic actuators for manual/automatic integrated switching.

RK bevel gear box-1 stair

Model：
RK
Specification：
350~900N.m
Pressure：
速比（Gear Ratio）4:1
Material：
Cast Iron，Ductile Iron

The RK bevel gear box-1 stair is a right-angle power transmission terminal utilizing a precision Gleason spiral bevel gear set. It is designed for industrial applications requiring 90° direction change, moderate reduction ratios, and high transmission efficiency – widely used in conveyors, packaging machinery, mixers, valve actuators, and agricultural equipment. The housing is made of high-quality cast iron or aluminum alloy. The internal bevel gear pair is case-hardened and ground, with contact patterns optimized by computer-aided design, ensuring smooth operation, high load capacity, and low noise. The unit supports dual-output (single input, dual output) or single-output configurations, and various mounting orientations, accommodating standard motors, servo motors, or hydraulic motors. The RK/2CK series integrates “right-angle turning, high efficiency, compact installation, and multi-shaft adaptability” into a 4-in-1 power module.Product Image of RK bevel gear box-1 stair

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2CK bevel gear box-1 stair

Model：
2CK
Specification：
1500~6800N.m
Pressure：
速比（Gear Ratio）4.2:1~7.1:1
Material：
Cast Iron，Ductile Iron

The 2CK bevel gear box-1 stair is a right-angle power transmission terminal utilizing a precision Gleason spiral bevel gear set. It is designed for industrial applications requiring 90° direction change, moderate reduction ratios, and high transmission efficiency – widely used in conveyors, packaging machinery, mixers, valve actuators, and agricultural equipment. The housing is made of high-quality cast iron or aluminum alloy. The internal bevel gear pair is case-hardened and ground, with contact patterns optimized by computer-aided design, ensuring smooth operation, high load capacity, and low noise. The unit supports dual-output (single input, dual output) or single-output configurations, and various mounting orientations, accommodating standard motors, servo motors, or hydraulic motors. The2CK series integrates “right-angle turning, high efficiency, compact installation, and multi-shaft adaptability” into a 4-in-1 power module.Product Image of 2CK bevel gear box-1 stair

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SB-1S Bevel Gearbox

Model：
SB-1S
Specification：
2350~22000N.m
Pressure：
速比（Gear Ratio）13.6:1~115.5:1
Material：
Cast Iron，Ductile Iron

The SB-1S bevel gear box-1 stair is a high-power right-angle power transmission terminal utilizing a precision Gleason spiral bevel gear set. It is engineered for heavy-duty industrial applications demanding very high reduction ratios, extremely high output torque, and 90° direction change – such as mining conveyors, rubber and plastic extruders, large mixers, port cranes, and marine propulsion systems. The housing is made of high-strength ductile iron or cast steel. The internal high-capacity spiral bevel gear pair is manufactured from 20CrMnTi or 17CrNiMo6 steel, case-hardened to HRC58-62, ground to grade 5-6 accuracy, and shot-peened. Through optimized tooth geometry and ratio selection, the SB-1S achieves total reduction ratios from 13.6:1 to 115.5:1 and output torque ratings from 2350 N·m to 22,000 N·m, providing reliable long-term operation under extreme heavy loads. The unit supports various mounting orientations and shaft arrangements, accommodating high-power electric motors, hydraulic motors, or diesel engines – realizing a true high-power 4-in-1 integration of “ultra-high reduction, ultra-high torque, high reliability, and right-angle heavy-duty turning”.Product Image of SB-1S Bevel Gearbox

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KB1S General type-2stair worm gear unit

Model：
KB1S
Specification：
1000~15000N.m
Pressure：
速比（Gear Ratio）72:1~118:1
Material：
Cast Iron，Ductile Iron

The KB1S General type-2stair two-stage worm gear unit is an industrial-grade power transmission terminal integrating two serially connected worm gear stages, ultra-high reduction ratios, exceptional torque density, and a compact modular design. It is purpose-built for heavy-duty valve actuation, mine hoisting equipment, warehouse stacker cranes, rubber machinery, and high-inertia automated lines requiring extreme speed reduction and self-locking safety. The housing is made of high-strength cast iron or ductile iron. The core transmission consists of a first-stage worm gear pair and a second-stage worm gear pair, each featuring case-hardened and ground alloy steel worms and high-grade tin bronze wheels. This delivers very low output speeds and extremely high output torque. Through optimized interstage matching and bearing support systems, the KB1S provides smooth power transmission, double redundant back-self-locking capability, and significantly higher output holding torque compared to single-stage units. The unit supports multiple mounting options — flange, foot, torque arm, and shaft-end — and can be flexibly paired with variable frequency motors, servo motors, or hydraulic motors, realizing a true 4-in-1 heavy-duty power module integrating “high reduction, high torque, double self-locking, and multi-condition adaptability”.Product Image of KB1S General type-2stair worm gear unit

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KB General 1 type-1stair worm gear unit

Model：
KB
Specification：
500~8500N.m
Pressure：
速比（Gear Ratio）33:1~67:1
Material：
Cast Iron，Ductile Iron

The KB General 1 type-1stair worm gear unit is an industrial-grade power transmission terminal that integrates high-precision worm and wheel gearing, low-backlash meshing, a compact housing structure, and modular interface designs. It is tailored for valve actuation, material handling equipment, packaging machinery, and various automated production lines requiring right-angle speed reduction and torque multiplication. The unit features a high-quality cast iron or high-strength aluminum alloy housing, with the core transmission pair consisting of a case-hardened alloy steel worm and a high-performance tin bronze worm wheel, delivering exceptional wear resistance and impact strength. Through optimized tooth geometry and precision manufacturing, the KB worm gear achieves smooth, low-noise operation while providing self-locking capability and high positioning torque. It supports multiple mounting styles — flange, foot, or shaft end — and can be directly combined with standard motors, servo motors, or handwheels, realizing a true 4-in-1 modular power integration of “reduction, torque multiplication, self-locking, and adaptability”.Product Image of KB General 1 type-1stair worm gear unit

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KB1SD General type-2stair worm gear unit

Model：
KB1SD
Specification：
8000~80000N.m
Pressure：
速比（Gear Ratio）217:1~1328:1
Material：
Cast Iron，Ductile Iron

The KB1SD General type-2stair two-stage worm gear unit is an industrial-grade heavy-duty power transmission terminal that builds upon the KB1S design by integrating a manual handwheel operation mechanism and an optimized high-ratio gear set. It is specifically designed for applications requiring extremely high reduction ratios, dual redundant self-locking safety, and on-site manual adjustment or emergency operation capability – such as large valve actuation, water gate hoists, crane positioning systems, mining hoists, and automated warehouse stackers. The housing is made of high-strength ductile iron. The drivetrain consists of a first-stage and a second-stage worm gear pair, matched to deliver a larger total reduction ratio with 15-20% higher output torque density than conventional two-stage units. A low-ratio handwheel is integrated at the output shaft opposite side or input side (depending on configuration), combined with a bidirectional clutch or decoupling mechanism. This allows manual drive or fine adjustment during power outages or emergency situations, achieving a true 5-in-1 integration of “high reduction, ultra-high torque, double self-locking, and dual manual/electric drive”.Product Image of KB1SD General type-2stair worm gear unit

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KB1SP Planet gear type-2 stair

Model：
KB1SP
Specification：
1850~80000N.m
Pressure：
速比（Gear Ratio）150:1~1680:1
Material：
Cast Iron，Ductile Iron

The KB1SP Planet gear type-2 stair is a premium hybrid power transmission terminal that integrates a precision planetary gear stage on top of a two-stage worm gear unit. It is designed for applications demanding extreme torque density, high torsional stiffness, minimal backlash, and an ultra-wide reduction ratio range – such as industrial robot base axes, CNC rotary tables (4th axis), high-precision servo turntables, radar tracking systems, and heavy-duty AGV drive wheels. The complete drivetrain consists of one planetary stage + two series-connected worm gear stages. The planetary stage (located at the input or intermediate position) features case-hardened and ground planet gears and a ring gear, while the worm stages continue with high-grade tin bronze wheels and alloy steel worms. With three stages of reduction, the KB1SP achieves total reduction ratios up to 10,000:1 or higher in a remarkably compact housing. Output torque density is increased by more than 40% compared to conventional two-stage worm units, while backlash is controlled within 1–3 arc-minutes. The unit supports flange, foot, and torque arm mounting, and is compatible with servo motors, stepper motors, or hydraulic motors – delivering a true 4-in-1 high-end power module integrating “ultra-high reduction, ultra-high torque, high rigidity, and low backlash”.Product Image of KB1SP Planet gear type-2 stair

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2CK-1S bevel gear box-2 stair

Model：
2CK-1S
Specification：
2350~22000N.m
Pressure：
速比（Gear Ratio）13.6:1~115.5:1
Material：
Cast Iron，Ductile Iron

The 2CK-1S bevel gear box-2 stair is a high-power right-angle power transmission terminal utilizing two precision Gleason spiral bevel gear sets connected in series. It is engineered for heavy-duty industrial applications demanding very high reduction ratios, extremely high output torque, and 90° direction change – such as mine hoists, large conveyors, rubber and plastic extruders, port machinery, metallurgical mill auxiliary drives, and marine main propulsion systems. The housing is made of high-strength ductile iron or cast steel. Both internal spiral bevel gear pairs are manufactured from 20CrMnTi or 17CrNiMo6 steel, case-hardened to HRC58-62, ground to grade 5-6 accuracy, and shot-peened. Through optimized two-stage ratio matching, the 2CK-1S achieves total reduction ratios from 13.6:1 to 115.5:1 and output torque ratings from 2350 N·m to 22,000 N·m, providing reliable long-term operation under extreme heavy loads. The unit supports various mounting orientations and shaft arrangements, accommodating high-power electric motors, hydraulic motors, or diesel engines – realizing a true high-power 4-in-1 integration of “ultra-high reduction, ultra-high torque, high reliability, and right-angle heavy-duty turning”.Product Image of 2CK-1S bevel gear box-2 stair

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SB Bevel Gearbox

Model：
SB
Specification：
220~6800N.m
Pressure：
速比（Gear Ratio）2.3:1~7.1:1
Material：
Cast Iron，Ductile Iron

The SB bevel gear box-1 stair is a general-purpose right-angle power transmission terminal utilizing a precision Gleason spiral bevel gear set. It is designed for industrial applications requiring moderate reduction ratios, a wide output torque range, and 90° direction change – such as conveyors, mixers, hoisting equipment, mining auxiliary drives, paper machinery, and marine auxiliary systems. The housing is made of high-strength cast iron or ductile iron. The internal high-capacity spiral bevel gear pair is manufactured from 20CrMnTi steel, case-hardened to HRC58-62, ground to grade 5-6 accuracy, and shot-peened. Through optimized tooth geometry and ratio selection, the SB achieves total reduction ratios from 2.3:1 to 7.1:1 and output torque ratings from 220 N·m to 6,800 N·m, providing reliable long-term operation under light to medium-heavy loads. The unit supports various mounting orientations and shaft arrangements, accommodating standard motors, servo motors, hydraulic motors, or diesel engines – realizing a true 4-in-1 general-purpose power integration of “moderate reduction, wide torque range, high reliability, and right-angle turning”.Product Image of SB Bevel Gearbox

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D Worm Gear Operator

Model：
D
Specification：
8500~100000N.m
Pressure：
速比（Gear Ratio）335:1~2662:1
Material：
Cast Iron，Ductile Iron

The D worm gear drive unit is a compact right-angle power transmission terminal utilizing a high-precision planar double-enveloping hourglass worm gear set or ZC-type worm gear pair. It is designed for industrial applications demanding very high reduction ratios, moderate output torque, and self-locking capability – such as valve actuators, conveyors, hoisting equipment, packaging machinery, agricultural machinery, and small lifting devices. The housing is made of high-strength cast iron or aluminum alloy. The internal high-capacity worm gear pair features a worm made of 40Cr or 20CrMnTi steel (case-hardened to HRC50-55, ground and polished) and a worm wheel centrifugally cast from high-grade tin bronze (ZCuSn10P1). Through optimized tooth geometry and meshing parameters, the D worm gear drive achieves total reduction ratios from 335:1 to 2662:1 and output torque ratings from 8500 N·m to 100000 N·m, providing reliable long-term operation under frequent start-stop and low-to-medium speed conditions. The unit offers reliable back-self-locking, supports various mounting orientations and shaft arrangements, and accommodates standard motors, servo motors, or handwheels – realizing a true 4-in-1 integration of “high reduction, moderate torque, self-locking safety, and compact installation”.Product Image of D Worm Gear Operator

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AB Worm Gear Operator

Model：
AB
Specification：
750~6500N.m
Pressure：
速比（Gear Ratio）36:1~178:1
Material：
Cast Iron，Ductile Iron

The AB worm gear drive unit is a compact right-angle power transmission terminal utilizing a high-precision planar double-enveloping hourglass worm gear set or ZC-type worm gear pair. It is designed for industrial applications demanding very high reduction ratios, moderate output torque, and self-locking capability – such as valve actuators, conveyors, hoisting equipment, packaging machinery, agricultural machinery, and small lifting devices. The housing is made of high-strength cast iron or aluminum alloy. The internal high-capacity worm gear pair features a worm made of 40Cr or 20CrMnTi steel (case-hardened to HRC50-55, ground and polished) and a worm wheel centrifugally cast from high-grade tin bronze (ZCuSn10P1). Through optimized tooth geometry and meshing parameters, the AB worm gear drive achieves total reduction ratios from 36:1 to 178:1 and output torque ratings from 750 N·m to 6,500 N·m, providing reliable long-term operation under frequent start-stop and low-to-medium speed conditions. The unit offers reliable back-self-locking, supports various mounting orientations and shaft arrangements, and accommodates standard motors, servo motors, or handwheels – realizing a true 4-in-1 integration of “high reduction, moderate torque, self-locking safety, and compact installation”.Product Image of AB Worm Gear Operator

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

RK bevel gear box-1 stair

2CK bevel gear box-1 stair

SB-1S Bevel Gearbox

KB1S General type-2stair worm gear unit

KB General 1 type-1stair worm gear unit

KB1SD General type-2stair worm gear unit

KB1SP Planet gear type-2 stair

2CK-1S bevel gear box-2 stair

SB Bevel Gearbox

D Worm Gear Operator

AB Worm Gear Operator

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