{"id":1895,"date":"2026-07-21T06:39:54","date_gmt":"2026-07-21T06:39:54","guid":{"rendered":"https:\/\/gearrack.top\/?p=1895"},"modified":"2026-07-21T06:46:11","modified_gmt":"2026-07-21T06:46:11","slug":"bronze-worm-wheels-for-industrial-applications","status":"publish","type":"post","link":"https:\/\/gearrack.top\/ja\/bronze-worm-wheels-for-industrial-applications\/","title":{"rendered":"Bronze Worm Wheels for Industrial Applications"},"content":{"rendered":"
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GEAR APPLICATION GUIDE \u00b7 WORM GEAR \u00b7 W06<\/span><\/p>\n

Bronze Worm Wheels for Industrial Applications:
\nMaterial Selection, Casting Methods and Wear Mechanism Engineering<\/span><\/h1>\n

The bronze worm wheel is the defining component of the worm gear drive \u2014 its material selection, casting method, and heat treatment determine the load rating, wear life, and efficiency of the entire gearbox more than any other single design decision. The choice between phosphor bronze PB2, aluminium bronze AB2, manganese bronze, nickel bronze, and centrifugal vs sand casting is not cosmetic \u2014 it is the fundamental engineering decision that separates a worm drive that runs for 50,000 hours from one that fails in 5,000. This comprehensive guide covers all industrial worm wheel bronze materials, casting methods, running-in procedures, lubrication requirements, and the failure modes that distinguish one material choice from another in real industrial service.<\/p>\n

PB2 \u00b7 AB2 \u00b7 CC480K \u00b7 C95500 \u00b7 Centrifugal Cast<\/span>
\nRatio 5:1\u2013100:1 \u00b7 42CrMo4 Worm \u00b7 VG 220\u2013460<\/span>
\nConveyor \u00b7 Hoist \u00b7 Mixer \u00b7 Material Handling<\/span><\/div>\n<\/div>\n<\/div>\n
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STANDARD MATERIAL<\/p>\n

PB2 \/ CC480K<\/p>\n

Phosphor bronze CuSn12 (GB\/ISO designation PB2, European EN CC480K) \u2014 the most widely used worm wheel material globally. Tensile strength 230\u2013270 MPa (centrifugal cast), \u03c3_H permissible \u2248 180\u2013210 MPa for case-hardened steel worm pair<\/p>\n<\/div>\n

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HEAVY DUTY OPTION<\/p>\n

AB2 \/ C95500<\/p>\n

Aluminium bronze CuAl10Ni5Fe4 (ISO AB2, ASTM C95500) \u2014 tensile strength 650\u2013700 MPa, permissible contact stress \u03c3_H up to 280 MPa. 35\u201350% higher load rating than PB2. Required for high-duty worm gears above 100 kW, hoists above 10 tonne, and continuous-duty industrial conveyors<\/p>\n<\/div>\n

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CASTING METHOD<\/p>\n

Centrifugal<\/p>\n

Centrifugal casting produces a superior grain structure in worm wheel blanks vs sand casting \u2014 the centrifugal force segregates impurities to the bore cavity (which is machined away), leaving a dense, fine-grained bronze rim with 15\u201325% higher tensile and fatigue strength than equivalent sand-cast material<\/p>\n<\/div>\n

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WORM SHAFT MATERIAL<\/p>\n

42CrMo4 HRC 55\u201360<\/p>\n

Induction hardened 42CrMo4 (or case carburized 20CrMnTi) worm shaft paired with PB2 or AB2 bronze wheel is the universal standard for industrial worm gear sets. The hardness differential (HRC 56\u201360 worm vs HB 75\u2013100 bronze wheel) ensures the worm thread polishes under running-in rather than wearing<\/p>\n<\/div>\n<\/div>\n

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Bronze Worm Wheel Material Selection \u2014 The Complete Engineering Guide<\/h2>\n

The selection of the correct bronze alloy for an industrial worm wheel is the single most impactful design decision in worm gear engineering. Unlike spur or helical gear design, where the tooth material contributes primarily to fatigue strength and the surface treatment provides hardness, the worm wheel bronze must simultaneously provide: (1) adequate contact fatigue strength to resist pitting under the high Hertzian contact stresses at the worm-wheel tooth contact ellipse; (2) adequate bending fatigue strength to resist tooth root fracture under the cyclic bending load from the worm thread engagement; (3) low friction coefficient against the hardened steel worm thread to minimise efficiency losses and heat generation; and (4) compatibility with the specified gear oil at the operating temperature \u2014 some bronze alloys, particularly aluminium bronze AB2, react with certain extreme pressure (EP) oil additives and should be paired with only approved lubricant types.<\/p>\n

\"bronze<\/p>\n

Korea Ever-Power’s bronze worm wheels for industrial applications<\/a> are available in four principal materials \u2014 PB2 phosphor bronze centrifugal cast (standard for the majority of industrial worm gear applications), AB2 aluminium bronze centrifugal cast (for high-duty and hoist applications), CC499K manganese bronze (for moderate-duty applications where PB2\u2019s cost is a constraint), and nickel silicon bronze (for food industry corrosion resistance combined with higher strength than PB2) \u2014 all manufactured in-house from Korea Ever-Power\u2019s own bronze casting furnace to controlled chemical composition, with material certification supplied with every worm wheel order.<\/p>\n

The distinction between centrifugal-cast and sand-cast bronze worm wheels is significant enough to specify explicitly in purchasing documentation, even though many suppliers default to sand casting for all but the largest worm wheels. In centrifugal casting, the liquid bronze is poured into a rotating cylindrical mould \u2014 the centrifugal force compresses the molten metal outward toward the mould wall (where the rim section, including the future tooth surface, is located) while the centrifugal segregation of porosity and impurities drives them toward the bore axis, which is subsequently machined away. The result is a rim section with 15\u201325% higher tensile strength and 20\u201330% higher contact fatigue resistance than sand-cast material of identical alloy composition. For worm wheels above 80 mm OD, Korea Ever-Power specifies centrifugal casting as the default production method \u2014 sand casting is used only for small worm wheels below 60 mm OD where centrifugal casting is impractical.<\/p>\n

\"types<\/p>\n

Korea Ever-Power centrifugal-cast phosphor bronze PB2 (CuSn12) worm wheel for industrial conveyor and material handling worm gear application \u2014 OD 280 mm, centre distance 100 mm, 40 teeth, ratio 40:1 (1-start worm). Material chemical composition: Cu \u2265 87%, Sn 11\u201313%, P 0.05\u20130.4%, Pb \u2264 0.1%. Hardness: HB 75\u2013100. Centrifugal cast blank \u2014 rim section density \u2265 8.85 g\/cm\u00b3 (theoretical maximum 8.90). Brinell hardness 75\u2013100 HB throughout rim cross-section (uniform, confirming sound centrifugal cast structure without porosity). Material certificate with chemical analysis and hardness results supplied with each worm wheel. Hobbed teeth with Ra \u2264 1.6 \u03bcm \u2014 requires running-in at reduced load for the first 50\u2013100 hours to achieve the polished contact surface that improves efficiency and extends service life.<\/figcaption><\/figure>\n<\/section>\n
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Bronze Alloy Comparison \u2014 Properties and Application Selection<\/h2>\n
\n\n\n\n\n\n\n\n\n\n
MATERIAL \/ DESIGNATION<\/th>\nUTS (MPa)<\/th>\n\u03c3_H PERM.<\/th>\nVS HARDENED WORM<\/th>\nEP OIL COMPAT.<\/th>\nBEST FOR<\/th>\n<\/tr>\n<\/thead>\n
PB2 \u2014 CuSn12 (CC480K)<\/td>\n230\u2013270<\/td>\n180\u2013210 MPa<\/td>\nExcellent<\/td>\nAll grades<\/td>\nStandard industrial, conveyor, packaging, up to 100 kW<\/td>\n<\/tr>\n
AB2 \u2014 CuAl10Ni5Fe4 (C95500)<\/td>\n650\u2013700<\/td>\n250\u2013280 MPa<\/td>\nExcellent with grade<\/td>\nSulfur EP NOT OK<\/td>\nHeavy-duty >100 kW, hoist above 10T, marine<\/td>\n<\/tr>\n
PB4 \u2014 CuSn12Ni2 (CC484K)<\/td>\n290\u2013320<\/td>\n200\u2013230 MPa<\/td>\nExcellent<\/td>\nAll grades<\/td>\nImproved-spec alternative to PB2, medium-heavy duty<\/td>\n<\/tr>\n
Nickel Si Bronze \u2014 CuNi2Si (C64700)<\/td>\n620\u2013660<\/td>\n240\u2013270 MPa<\/td>\nGood<\/td>\nAll grades<\/td>\nFood, corrosive env., high strength + corrosion resistance<\/td>\n<\/tr>\n
Plastic (POM\/MC Nylon) wheel<\/td>\n60\u201390<\/td>\n30\u201350 MPa<\/td>\nOK (special pairing)<\/td>\nGrease only<\/td>\nVery light duty, corrosion-free, no lubrication access<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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ALUMINIUM BRONZE (AB2) \u2014 SPECIAL REQUIREMENTS<\/h3>\n

AB2 aluminium bronze worm wheels require specific lubrication attention that is not required for PB2 phosphor bronze. Sulfur-bearing extreme pressure (EP) additives \u2014 present in virtually all GL-5 hypoid gear oils and many GL-4 industrial gear oils \u2014 react with the aluminium in AB2 bronze to form aluminium sulfide compounds that precipitate on the tooth surface, causing accelerated wear and surface roughening. The consequence: using a standard GL-5 gear oil in a worm gearbox fitted with AB2 worm wheels typically reduces the worm wheel life to 30\u201340% of the expected life for that bronze material.<\/p>\n

Correct lubricants for AB2 aluminium bronze worm wheels: phosphate ester-based or polyglycol (PG) worm gear oils without sulfur EP additives; or mineral oil with non-sulfur anti-wear additives (zinc-phosphate ZDDP type). Kl\u00fcber Kl\u00fcberoil GEM 1-150 N and Shell Omala S4 WE series are examples of worm gear oils confirmed as compatible with AB2 bronze. Always verify lubricant compatibility with the worm wheel material before specifying \u2014 contact Korea Ever-Power or the oil supplier for AB2 compatibility confirmation of any specific oil grade.<\/p>\n<\/div>\n

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WORM WHEEL RUNNING-IN PROCEDURE<\/h3>\n

New worm wheels \u2014 whether PB2 or AB2 \u2014 must be run in at reduced load for the first 50\u2013100 operating hours to allow the bronze tooth surface to polish under the sliding contact with the hardened worm thread. This running-in process smooths the initial hobbing surface roughness (Ra 1.6\u20133.2 \u03bcm) to the polished surface (Ra 0.2\u20130.4 \u03bcm) that provides optimal EHL oil film formation and minimises ongoing wear rate. A worm gearbox put immediately into full-load service without running-in typically shows 2\u20133\u00d7 higher wear rate in the first 500 hours than one that has been properly run in.<\/p>\n

Recommended running-in schedule: Hours 0\u201320: 25% of rated load. Hours 20\u201350: 50% of rated load. Hours 50\u2013100: 75% of rated load. Hours 100+: full rated load. After running-in period: drain the initial oil charge (which will contain fine bronze wear particles from the polishing process), flush with clean oil, and refill with fresh oil to the specified grade before returning to full-load service. The bronze particle contamination in the first oil change is normal and expected \u2014 it does not indicate a fault.<\/p>\n<\/div>\n<\/div>\n

\"customized
Korea Ever-Power customised worm gear set for heavy-duty industrial conveyor application \u2014 42CrMo4 induction hardened worm shaft (HRC 56\u201360 thread surface, ground to Ra \u2264 0.4 \u03bcm), paired with AB2 aluminium bronze centrifugal-cast worm wheel. Centre distance 160 mm, ratio 30:1 (2-start worm), input 1,450 RPM, output torque 4,200 Nm. Permissible contact stress verified against ISO 14521 worm gear standard at \u03c3_H = 258 MPa (below AB2 limit of 280 MPa at continuous rated load). Supplied as matched set with shaft bore dimensions, keyway, and oil fill type specified per customer gearbox drawing. Individual material certificate and dimensional inspection report. Also available: complete custom worm gearbox assembly in K-series cast iron housing or stainless housing for hygienic applications.<\/figcaption><\/figure>\n<\/section>\n
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\"Korea
Korea Ever-Power worm gear manufacturing and bronze casting facility \u2014 in-house centrifugal casting furnace for PB2 (CuSn12) and AB2 (CuAl10Ni5Fe4) bronze worm wheel blanks in OD 50\u20131,200 mm, followed by CNC hobbing and tooth profile measurement on dedicated worm gear inspection equipment. Chemical composition analysis by optical emission spectrometry (OES) on every bronze casting batch \u2014 Cu, Sn, Al, Ni, Fe, P concentrations confirmed against EN CC480K (PB2) or EN CC212E (AB2) alloy specification before machining begins. Hardness banding test on every centrifugal-cast blank rim cross-section to confirm sound casting without internal porosity that would reduce the effective bronze fatigue strength below the rated material value.<\/figcaption><\/figure>\n

Industrial Applications by Bronze Material Grade<\/h2>\n
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PB2 APPLICATIONS<\/p>\n

STANDARD
\nINDUSTRIAL<\/p>\n<\/div>\n

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Phosphor bronze PB2 (CuSn12) centrifugal-cast worm wheels are the standard for industrial conveyor drives, industrial gearbox NMRV\/NMR series, packaging machine worm drives, material handling drives, textile machinery drives, elevator auxiliary drives, and all worm gear applications below 100 kW at continuous duty. PB2 is compatible with all standard industrial gear oil types (GL-4, GL-5, synthetic PAO, polyglycol) without restriction \u2014 making it the lowest-complexity specification choice. Annual production volume at Korea Ever-Power is the highest of any worm wheel material, with standard sizes held in stock for same-week delivery. Standard worm wheels for SEW-Eurodrive SA\/SK\/R series, Nord Drivesystems, Motovario NMRV series, and all GB\/T standard worm gearbox series are stocked in PB2 and available without minimum order quantity for replacement supply. The primary limitation of PB2 is its relatively modest tensile strength (230\u2013270 MPa) \u2014 it is not suitable for shock-loaded applications such as crusher auxiliary drives or for continuous duty above 100 kW without a size penalty that may make AB2 the more economical choice at larger centre distances.<\/p>\n<\/div>\n<\/div>\n

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AB2 APPLICATIONS<\/p>\n

HEAVY DUTY
\nINDUSTRIAL<\/p>\n<\/div>\n

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Aluminium bronze AB2 (CuAl10Ni5Fe4) centrifugal-cast worm wheels are specified for high-duty industrial applications where PB2\u2019s load rating is insufficient at the available centre distance: overhead crane hoists above 10 tonne lift capacity, heavy material handling conveyors above 100 kW, marine bow thruster worm gears, mining equipment auxiliary drives, and large press and injection moulding machine hydraulic pump drives. The AB2 worm wheel\u2019s 35\u201350% higher contact fatigue resistance vs PB2 allows the worm gear pair to transmit the same power in a smaller centre distance \u2014 in some cases avoiding the need for a larger gearbox frame size that would be required if PB2 were specified. The mandatory compatibility check between AB2 and the gear oil is the primary complication \u2014 Korea Ever-Power supplies AB2 worm wheels with a lubricant compatibility data sheet confirming which specific oil grades have been tested and confirmed compatible with the supplied AB2 alloy batch.<\/p>\n<\/div>\n<\/div>\n

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SPECIALTY<\/p>\n

CORROSION &
\nFOOD GRADE<\/p>\n<\/div>\n

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Nickel silicon bronze (CuNi2Si, C64700) and duplex (bimetal) worm wheels with a steel hub and a bronze rim bonded by centrifugal casting are the two specialty options for demanding corrosion or cost contexts. Nickel silicon bronze combines the corrosion resistance of a copper-nickel alloy with higher strength than PB2, making it suitable for food processing, chemical plant, and marine worm gear applications where the combination of corrosion exposure, NSF H1 lubricant compatibility, and moderate-to-high load rating is required. Duplex (bimetal) worm wheels \u2014 steel hub shrink-fit or centrifugal-bonded with a bronze rim \u2014 are the most economical solution for large worm wheels above 400 mm OD where a solid bronze wheel would require an excessively large and expensive casting, but where the full load rating of solid bronze is still required at the tooth contact surface. Korea Ever-Power manufactures duplex worm wheels with centrifugal-bonded PB2 or AB2 bronze rims on steel hubs up to 1,200 mm OD for large industrial worm gear applications. See also: worm gear reducer<\/a> selection guide for worm gear centre distance and ratio optimisation for heavy industrial drives.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\"measuring<\/p>\n

Frequently Asked Questions \u2014 Bronze Worm Wheels for Industrial Applications<\/h2>\n
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Q 01<\/span><\/p>\n

How do I identify whether my failed worm wheel is PB2 or AB2 bronze when ordering a replacement, if the original specification is unknown?<\/p>\n<\/div>\n

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Identification of the bronze alloy from a failed worm wheel can be performed by three methods in ascending order of certainty: (1) Visual colour identification:<\/strong> PB2 phosphor bronze has a distinctly reddish-gold to pale gold colour (similar to copper), while AB2 aluminium bronze has a distinctly yellowish-gold to yellow colour (similar to brass). This method gives a confident answer in approximately 70% of cases \u2014 in well-worn wheels where the colour is obscured by oil staining, the other methods are needed. (2) Hardness test:<\/strong> PB2 phosphor bronze Brinell hardness is 75\u2013100 HB; AB2 aluminium bronze is 150\u2013200 HB \u2014 approximately double. A simple Brinell or Rockwell surface hardness test on the wheel hub face (not the tooth surface, which has different hardness from wear) will distinguish PB2 from AB2 reliably. A workshop Rockwell B test result below 60 HRB = PB2; above 80 HRB = AB2. (3) Chemical spot test:<\/strong> a drop of 10% hydrochloric acid on the freshly machined surface of PB2 releases a faint smell of hydrogen sulfide (from the tin-sulfide phase in phosphor bronze); AB2 shows no such reaction. This is a confirmatory test, not a primary identification method. When ordering a replacement worm wheel and the material is uncertain: if the gearbox is a standard catalogue frame size (NMRV, K series, WP series, etc.), Korea Ever-Power can identify the original material from the gearbox type designation and size. If the gearbox is custom or non-standard, specify the application duty (power, speed, duty cycle) and Korea Ever-Power will recommend the correct bronze grade.<\/p>\n<\/div>\n<\/div>\n

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Q 02<\/span><\/p>\n

My worm wheel is showing progressive pitting on the tooth flanks \u2014 is this a material problem, a lubrication problem, or a load rating problem?<\/p>\n<\/div>\n

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Bronze worm wheel tooth flank pitting requires root cause identification before replacement \u2014 if the replacement wheel is the same material and operating under the same conditions, it will fail at the same rate. Root cause diagnosis by pitting pattern and rate: (1) Rapid pitting within 500 hours at rated load (material problem):<\/strong> the bronze alloy is incorrect for the application duty \u2014 either PB2 in a duty that requires AB2, or a sand-cast wheel where centrifugal cast is required. The pitting initiates at porosity or inclusion sites in the sand-cast rim and propagates rapidly. Remedy: replace with centrifugal-cast wheel of the same or upgraded alloy, confirm centre distance and alignment. (2) Progressive pitting after 5,000\u201315,000 hours (wear end-of-life):<\/strong> normal fatigue failure at the end of the design life. The wheel has run its useful life; replacement with the same specification is appropriate. Examine the worm shaft thread surface \u2014 if the worm thread shows glazing or wear lines, the worm shaft should be replaced or re-ground simultaneously with the wheel to restore the hardness differential. (3) Edge pitting on one side of the tooth face (lubrication or alignment problem):<\/strong> pitting concentrated at one tooth face end indicates misalignment between worm and wheel axes, or inadequate face-width contact due to worm shaft deflection at rated load. Check worm shaft deflection at maximum rated torque \u2014 should not exceed 0.05 mm at the worm thread centre. (4) Uniform thin layer of surface material removed (oil-related pitting):<\/strong> caused by inadequate EHL film from incorrect oil viscosity (too low), contaminated oil, or overheated oil above 80\u00b0C. Drain and refill with correct ISO VG grade; if oil temperature exceeds 80\u00b0C at full load, upgrade to the next higher viscosity grade.<\/p>\n<\/div>\n<\/div>\n

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Q 03<\/span><\/p>\n

What is the minimum order quantity and lead time for custom bronze worm wheels at Korea Ever-Power, and can I order a single replacement piece?<\/p>\n<\/div>\n

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Korea Ever-Power operates three supply tiers for bronze worm wheels with different MOQ and lead time structures: (1) Stock worm wheels (common NMRV, K-series, WP-series sizes in PB2):<\/strong> MOQ 1 piece, immediate dispatch from Korea Ever-Power\u2019s Hangzhou warehouse within 2 working days. These cover the 30 most common worm wheel sizes used in standard catalogue gearboxes. (2) Made-to-order standard sizes (PB2 or AB2, OD 50\u2013300 mm, standard gear geometry):<\/strong> MOQ 3 pieces, lead time 10\u201318 days. For MOQ 1 piece on made-to-order: lead time 15\u201322 days (single piece incurs higher setup cost per piece but is supplied without MOQ restriction). (3) Large custom worm wheels (OD above 300 mm, duplex bimetal, or specialty alloy):<\/strong> MOQ 1 piece, lead time 20\u201335 days depending on size and alloy. For emergency replacement of a failed worm wheel causing production line downtime, Korea Ever-Power can prioritise production of a single replacement wheel ahead of batch orders \u2014 contact Korea Ever-Power\u2019s emergency supply team directly with the wheel dimensions (OD, number of teeth, module, bore diameter and keyway, face width, and bronze grade) and the production restart deadline for availability assessment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Explore Korea Ever-Power Gear Categories<\/h2>\n

Seven precision gear product lines for industrial, food processing, marine and specialist applications worldwide.<\/p>\n<\/div>\n

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\"spur<\/p>\n

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Spur Gears<\/a><\/p>\n

M1\u2013M20 \u00b7 industrial \u00b7 conveyor \u00b7 316L<\/p>\n<\/div>\n<\/div>\n

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\"helical<\/p>\n

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Helical Gears<\/a><\/p>\n

Low noise \u00b7 high load \u00b7 double helical<\/p>\n<\/div>\n<\/div>\n

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\"bevel<\/p>\n

\n

\u30d9\u30d9\u30eb\u30ae\u30a2<\/a><\/p>\n

Right-angle \u00b7 spiral \u00b7 industrial drive<\/p>\n<\/div>\n<\/div>\n

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\"worm<\/p>\n

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Worm Gears<\/a><\/p>\n

PB2 \u00b7 AB2 \u00b7 centrifugal cast \u00b7 industrial<\/p>\n<\/div>\n<\/div>\n

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\"ring<\/p>\n

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Ring Gears<\/a><\/p>\n

Internal \u00b7 large ring \u00b7 wind \u00b7 slewing<\/p>\n<\/div>\n<\/div>\n

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\"planetary<\/p>\n

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Planetary Gears<\/a><\/p>\n

Compact \u00b7 high torque density \u00b7 servo<\/p>\n<\/div>\n<\/div>\n

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\"plastic<\/p>\n

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Plastic Gears<\/a><\/p>\n

POM \u00b7 MC Nylon \u00b7 light worm wheel alt.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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GET A QUOTATION \u00b7 KOREA EVER-POWER<\/p>\n

Need Bronze Worm Wheels for Industrial Applications?<\/h2>\n

Korea Ever-Power manufactures centrifugal-cast PB2 phosphor bronze and AB2 aluminium bronze worm wheels for all industrial worm gear applications \u2014 OD 50\u20131,200 mm, module M1\u2013M20, standard and custom tooth geometry. Matched worm shaft sets in 42CrMo4 induction hardened. Stock for NMRV, K-series, and WP-series replacements. Duplex bimetal worm wheels for large-diameter applications. AB2 lubricant compatibility data sheet supplied. ISO 9001:2015 certified with individual material and dimensional certificates.<\/p>\n

Request a Quotation \u2192<\/a><\/p>\n<\/div>\n

\u7de8\u96c6\u8005: Cxm<\/em><\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

GEAR APPLICATION GUIDE \u00b7 WORM GEAR \u00b7 W06 Bronze Worm Wheels for Industrial Applications: Material Selection, Casting Methods and Wear Mechanism Engineering The bronze worm wheel is the defining component of the worm gear drive \u2014 its material selection, casting method, and heat treatment determine the load rating, wear life, and efficiency of the entire gearbox more than any other single design decision. The choice between phosphor bronze PB2, aluminium bronze AB2, manganese bronze, nickel bronze, and centrifugal vs sand casting is not cosmetic \u2014 it is the fundamental engineering decision that separates a worm drive that runs for 50,000 hours from one that fails in 5,000. This comprehensive guide […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[4566],"tags":[],"class_list":["post-1895","post","type-post","status-publish","format-standard","hentry","category-application-of-gears"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/posts\/1895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/comments?post=1895"}],"version-history":[{"count":5,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/posts\/1895\/revisions"}],"predecessor-version":[{"id":1901,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/posts\/1895\/revisions\/1901"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/media?parent=1895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/categories?post=1895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gearrack.top\/ja\/wp-json\/wp\/v2\/tags?post=1895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}