Yamamoto Seisakusho, Inc.
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Gear parts

Thickness 5.00mm
Length φ58.50mm
Material S15C
Application Recliner seat part
Features Two gears having different modules were combined in this gear part using FB forging technology.
Thickness 4.00mm
Length φ60.00mm
Material S15C
Application Recliner seat part
Features Two gears having different modules were combined in this gear part using FB forging technology.
Thickness 6.00mm
Length φ26.16mm
Material SCM415
Application Recliner seat part
Features
  • The conventional fabrication of machining is replaced with FB.
  • Drastic reductions are realized for both processing time and cost.
  • A special FB die having a metalworking-oil coating mechanism is used to provide more strength for the punch/die of the teeth.
    		•
    Thickness 6.00mm
    Length 60.00mm
    Material SAPH400
    Application Recliner seat part
    Features
  • The conventional fabrication of machining is replaced with FB.
  • Drastic reductions are realized for both processing time and cost.
  • A special FB die having a metalworking-oil coating mechanism is used to provide more strength for the punch/die of the teeth.
    		•
    Thickness 7.20mm
    Length φ128.00mm
    Material SS400
    Application Sprocket gear
    Features
  • The conventional fabrication using a lathe + hobbing machine is replaced with FB.
  • With FB, the rounding inherent to stamping can be utilized as-is; and it is necessary to perform a post-operation of rounding only for one side, thus reducing the number of operations.
    		•
    Thickness 6.00mm
    Length 92.00mm
    Material SAPH400
    Application Automatic door part for construction
    Features This FB part is only 60% of the cost of a machined part.
    Thickness 2.00mm
    Length 350.00mm
    Material S45C
    Application  
    Features
  • This is an extremely thick inner gear with a small module.
  • Stacking the parts results in gaps where the rounding occurs. However, the extremely small gaps form oil sumps and act as oil supply grooves, resulting in the favorable effect of being quieter than the conventional part.
    		•
    Thickness 2.00mm
    Length 28.00mm
    Material S45C
    Application Reduction gear
    Features
  • This gear is formed by stacked parts having three half-pierced buttons that are used for positional alignment and caulking.
  • The dimensions of the positional relationship between the exterior form and the half-piercings are important.
    		•
    Thickness 6.00mm
    Length φ98.00mm
    Material SAPH440
    Application Electric recliner part
    Features
  • The conventional fabrication using a general press + broaching is replaced with FB.
  • Costs were reduced by more than 30%
    		•
    Thickness 2.00mm
    Length 160.00mm
    Material High tensile steel
    Application Automobile window regulator part
    Features
  • The gear portion easily fractures because a high tensile strength steel plate is used.
  • A high-precision gear is made with FB using our technology.
    		•
    Thickness 3.60mm
    Length 25.50mm
    Material SCM415
    Application Automobile recliner seat part
    Features A metalworking-oil supply mechanism was embedded in the interior of the FB die at the gear portion where the load is high to extend the life of the die and help improve the sheared surface of the teeth.
    Thickness 3.00mm
    Length 53.53mm
    Material S45C
    Application Automobile reclining seat part
    Features A metalworking-oil supply mechanism was embedded in the interior of the FB die at the gear portion where the load is high to extend the life of the die and help improve the sheared surface of the teeth.
    Thickness 4.00mm
    Length φ85.00mm
    Material SAPH440
    Application Automobile engine (variable valve timing sprocket) part
    Features
  • FB realized higher strength, lower weight, and lower costs for this product conventionally made by sintering.
  • The chock at the tooth flank is to correct the slight punching tilt. The radius of the side surface is formed without machining by forcing the rounding back halfway.
    		•
    Thickness 4.50mm
    Length 24.00mm
    Material S35C
    Application Auto adjuster part
    Features
  • The hole had previously been made using a drilling machine because of the extremely narrow edge between the exterior form and the hole.
  • The teeth, which were previously made by broaching, are made by a FB press + press broaching.
    		•
    Thickness 4.00mm
    Length 40.00mm
    Material SPHC
    Application Automobile drum brake part
    Features
  • The hole had previously been made using a drilling machine because of the extremely narrow edge of 1.7 mm between the exterior form and the hole.
  • The teeth, which were previously made by teeth broaching, are made by FB and SV presses.
    		•
    Thickness 4.00mm
    Length 52.00mm
    Material SPHC
    Application Automobile drum brake part
    Features
  • The hole had previously been made using a drilling machine because of the extremely narrow edge of 1.7 mm between the exterior form and the hole.
  • The teeth, which were previously made by teeth broaching, are made by FB and SV presses.
    		•
    Thickness 3.00mm
    Length 37.00mm
    Material S45C
    Application Recliner seat part
    Features Oil is supplied locally to the gear portion inside the die to extend the life of the die and help improve the sheared surface of the teeth.