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KB General 1 type-1stair worm gear unit

KB General 1 type-1stair worm gear unit

  • Model:KB
  • Specification:500~8500N.m
  • Temperature:-20~80℃
  • Medium:
  • Pressure:速比(Gear Ratio)33:1~67:1
  • Connection method:
  • Driving method:worm gear
  • Material:Cast Iron,Ductile Iron
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KB General 1 type-1stair worm gear unitOverview

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

KB General 1 type-1stair worm gear unitCharacteristic

1.High-Efficiency, High-Capacity Worm Gear Set : Made of premium ZCuSn10P1 tin bronze for the wheel and 40Cr case-hardened ground worm, the gear set offers significantly improved transmission efficiency, strong resistance to pitting and scoring, and extended service life.

2.Compact Modular Housing Design : The housing is topologically optimized for rigidity while keeping a small footprint. Input/output interfaces conform to international standards, allowing quick adaptation to IEC motors, servo motors, or handwheels – greatly simplifying selection and installation.

3.Reliable Back-Self-Locking Function : Leveraging the inherent friction angle characteristics of a single-stage worm drive, the unit provides natural back-self-locking at appropriate reduction ratios, effectively preventing reverse rotation of the load — ideal for lifting mechanisms, rotary tables, and valve actuators.

4.Low Noise & Low Backlash Option : Thanks to precision gear grinding and preload adjustment, standard backlash is controlled within 3–5 arc-minutes; ultra-high precision grade (<1 arc-minute) is available upon request, meeting servo positioning and silent operation requirements.

5.Multi-Seal & Long-Life Lubrication : Double-lipped oil seals or FKM seals are applied at input/output shafts, combined with integrated housing gaskets, achieving up to IP65 protection. Pre-filled with synthetic grease for life-long maintenance-free operation.

6.Wide Mounting Orientation Flexibility : Supports six mounting arrangements (M1 to M6), including foot, flange, torque arm, etc., adaptable to horizontal, vertical, or tilted installation angles — suitable for diverse and demanding spatial layouts.

KB General 1 type-1stair worm gear unitstructure principle

Structural Drawing of KB General 1 type-1stair worm gear unit

List of Component Names and Materials

No.NameQtyMaterial
1End Cover2ASTM A216 WCB
2Tapered Roller Bearing2ASTM A295 52100
3Worm1ASTM 1045
4Indicator Dial1ASTM A576 1025+Zn
5Oil Seal1NBR
6Worm Gearbox Cover1ASTM A216 WCB
7Worm Gearbox1ASTM A216 WCB
8O-ring1NBR
9Worm Gear1ASTM A536 65-45-12
10Spline Nut1ASTM 1045
11Retaining Ring for Bore1CM65


Material Specification for Turbine Unit

CategoryComponentCast Iron StandardHigh TemperatureCast Steel StandardLow TemperatureUltra-low Temp & Corrosive
Worm GearboxTemp: -20~80℃Temp: -20~180℃Temp: -20~80℃Temp: -40~80℃Temp: -60~80℃
Worm Gear HousingGB/T 1348 QT450-10GB/T 1348 QT450-10ASTM A216 WCBASTM A352 LCBASTM A352 LCC
Worm Gear CoverGB/T 1348 QT450-10GB/T 1348 QT450-10ASTM A216 WCBASTM A352 LCBASTM A352 LCC
Base PlateGB/T 1348 QT450-10GB/T 1348 QT450-10ASTM A216 WCBASTM A352 LCBASTM A352 LCC
Worm WheelGB/T 1348 QT600-3GB/T 1348 QT600-3GB/T 1348 QT600-3GB/T 1348 QT600-3GB/T 1348 QT600-3
Worm ShaftGB/T 3077 20CrMnTiGB/T 3077 20CrMnTiGB/T 3077 20CrMnTiGB/T 3077 20CrMnTiGB/T 3077 20CrMnTi
Shaft SleeveComposite MaterialCopper AlloyComposite MaterialComposite MaterialComposite Material
Carbon Steel + PTFECarbon Steel + PTFECarbon Steel + PTFECarbon Steel + PTFE
BearingCommercial Bearing SteelCommercial Bearing SteelCommercial Bearing SteelCommercial Bearing SteelCommercial Bearing Steel
Indicator NeedleA3 Stamping + Plastic SprayingA3 Stamping + Plastic SprayingA3 Stamping + Plastic SprayingA3 Stamping + Plastic SprayingA3 Stamping + Plastic Spraying
Adjusting ScrewClass 8.8Class 8.8Class 8.8Class 8.8Class 8.8
SealsNBR 70 -30~100℃FKM 70 -20~200℃NBR 70 -30~100℃VMQ 60 -60~200℃VMQ 60 -60~200℃
GreaseLithium-based GreaseHigh-temp GreaseLithium-based GreaseLow/High-temp GreaseAviation Grease
-20~120℃-30~200℃-20~120℃-50~180-70~180℃
BoltClass 8.8Class 8.8Class 8.8Class 8.8Class 8.8
GearsMulti-stage HousingGB/T 1348 QT450-10GB/T 1348 QT450-10ASTM A216 WCBASTM A352 LCBASTM A352 LCB
Multi-stage CoverGB/T 1348 QT450-10GB/T 1348 QT450-10ASTM A216 WCBASTM A352 LCBASTM A352 LCB
Gear DiscGB/T 699 45GB/T 699 45GB/T 3077 40CrGB/T 3077 40CrGB/T 3077 40Cr
Gear ShaftGB/T 699 45GB/T 3077 40CrGB/T 3077 40CrGB/T 3077 40CrGB/T 3077 40Cr
Worm ShaftGB/T 1220 2Cr13GB/T 1220 2Cr13GB/T 1220 2Cr13GB/T 1220 2Cr13GB/T 1220 2Cr13


KB General 1 type-1stair worm gear unittechnology parameter

Technical Data Sheet

SIZE MODELGearRatioMax Stem Diameter(mm)Mounting StandardMax Output TorqueM.A.Weight
X.nKgf.m±10%Kg
KB-0033:128(8X7)F-1050051106
KB-039:135(10X8)F-1298010011.710
KB-0146:145(14X9)F-14140014313.813
KB-0249:155(18X11)F-16250025517.122
KB-0360:165(20X1)F-2040004781931
KB-0468:180(22X14)F-2560506172050
KB-0559:1105 (28X16)F-30700071417.580
KB-0667:1115(32X18)F-3585008672090


KB General 1 type-1stair worm gear unitstandard size

Standard requirements for external dimensions

Design Standard: ISO 5211 Technical Specification

Protection Class: IP65

Flange Standard: ISO 5210

Outline Dimensions with Electric Actuator Connection

Outline Dimensions with Locking Device

Outline Drawing of KB General 1 type-1stair worm gear unit

Outline dimension table(Unit: mm)

DIM MODELBASE PARTEXTERNAL PARTINPUT SHAFT PARTHAND WHEEL
TYPEFLANGE SIZEΦD1P.C.DΦD3HH1BKK1K2K3LL1
D2N-H-DPL2ΦPDKEYΦM
KB-00AF-10701024-M10-151253551513543422007010235155300
KB-0F-12851254-M12-18150662038951472308313535216370
KB-01F-141001404-M16-24175475230895258285924535216450
KB-02F-161301654-M20-30210592270108636233011319240288550
KB-03BF-201402058-M16-242505111303110616037012521340288650
KB-04F-252002548-M16-243001453501408110042015525640288700
KB-05F-302302988-M20-3035016040014575102425197265504512750
KB-06F-352603568-M30-4541520047017091112510230340504512750