Custom Engine Balance Shafts manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
Engine balance shafts operate at one or two times engine speed to cancel out second-order inertial forces and torsional vibrations in internal combustion engines. ZhongYi manufactures custom balance shafts directly from OEM customer drawings or worn samples. Critical manufacturing features include integral precision gear teeth (spur or helical with tight backlash), high-precision cylindrical bearing journals with sub-micron runout, oil delivery passages, and calibrated eccentric weights. Every shaft undergoes rigorous dynamic balancing (typically ISO 1940 Grade G2.5 or G6.3) and magnetic particle inspection to guarantee fatigue endurance under cyclic bending stresses.
Tooth AccuracyDIN 5-7 / AGMA 11-13
Tooth FinishingCNC Ground (Ra ≤0.4µm)
Hardness GradeCarburized 58-62 HRC
Custom Engine Balance ShaftsFactory Genuine Spec
Selection guidance
How to specify a custom engine balance shafts for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
When requesting a quotation for custom engine balance shafts, provide 2D prints specifying gear tooth geometry (module, pressure angle, helix angle, pitch diameter, normal tooth thickness), journal bearing dimensions and tolerances (typically h6/f7), runout datums, oil passage locations, and allowable unbalance limits (g-mm or ISO grade). Indicate whether mating gears, bearings, or mounting carriers are part of the scope. ZhongYi provides full DFM feedback within 24 hours.
Technical specifications
Core technical parameters for engineering and procurement review.
Component Type
Integral eccentric counter-balance shaft with precision drive gear
Manufacturing Basis
Customer CAD drawings (STEP, DWG), forging prints, or master samples
Materials
Forged 40Cr, 42CrMo, 20CrMnTi, or Ductile Iron (QT600-3 / QT700-2)
Gear Geometry
Normal Module Mod 1.5 - 3.5, helical or spur, low-noise tooth profile crowning
Tooth Accuracy
CNC Gear Ground to DIN 5-6 / AGMA 12 (Ra ≤ 0.4 µm)
Journal Runout
Total radial runout TIR ≤ 0.008 mm, journal roundness ≤ 0.003 mm
Manufacturing details that can be reviewed before quotation.
Integral single-piece forged gear or press-fit splined gear assembly
Helical gear pairs with scissors gear / anti-backlash spring mechanism
Gun-drilled axial and radial forced lubrication oil passages
Phosphate coating, black oxide, or liquid nitriding for anti-scuffing protection
100% Magnetic particle inspection (MPI) and ultrasonic crack detection
Quality control
Inspection points tied to the approved technical file.
Zeiss 3D CMM verification of all journal diameters, eccentric offsets, and runout datums
Klingelnberg gear testing for pitch deviation, tooth trace, and lead crowning profile
Schenck dynamic balancing machine check with printed residual unbalance report
Metallographic case depth, core microstructure, and microhardness traverse inspection
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Engine Balance Shafts.
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
Balance shaft failure can cause severe engine vibration and bearing seizure. ZhongYi controls every critical step in-house: rough turning, stress-relief tempering, CNC finish turning, gear hobbing, induction hardening, precision cylindrical grinding, and dynamic balancing. Material test reports (EN 10204 Type 3.1) and CMM inspection records accompany each production batch.
Coordinate Metrology
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ±0.002 mm.
Tooth Geometry Analysis
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fα), lead crowning (fβ), pitch cumulative error (Fp), and radial runout (Fr).
Hardness & Case Depth
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58–62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
Chemical Metallurgy
Direct-Reading Optical Spectrometer
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
Inspection Deliverables with Every Shipment
Complete Batch Traceability & Certified Test Reports
EN 10204 Type 3.1 Mill Test Certificate (Chemical & Mechanical Properties)
Zeiss 3D CMM Full Dimensional Inspection Sheet
Klingelnberg Tooth Profile & Lead Crowning Graph Report
Effective Carburized Case Depth & Hardness Curve Data
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
Common questions before ordering custom engine balance shafts products.
Critical specifications are confirmed against final drawings before production.
Can ZhongYi manufacture balance shafts with integral scissors (anti-backlash) gears?▼
Yes, we manufacture balance shafts with integral ground gears as well as hub interfaces for spring-loaded scissors gears designed to eliminate gear rattle during engine idle and deceleration.
What dynamic balance tolerance can ZhongYi achieve?▼
We achieve dynamic balancing down to ISO 1940 Grade G2.5 for high-revving automotive engines and Grade G6.3 for industrial diesel power units on computer-controlled Schenck balancing rigs.
Can you produce balance shafts from a physical sample without CAD drawings?▼
Yes, our engineering department uses optical 3D coordinate measuring machines and Klingelnberg gear inspection centers to reverse-engineer balance shaft geometry, eccentric center-of-mass, and tooth profiles from undamaged samples.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Engine Balance Shafts Manufacturing
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Supported CAD Blueprint & Drawing Formats:
STEP (.step / .stp) AutoCAD (.dwg / .dxf) IGES (.igs) SolidWorks / 3D CAD PDF Technical Blueprints Worn Physical Samples
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
