PRODUCTS
(BY INDUSTRY)

AUTOMOBILE EV-UNIT

Helical Tooth Forged Gear

This forging method is aiming to achieve less CO2 emission and become more green-friendly.
By forging the outer helical tooth, we can suggest cost reduction, material yield improvement.

i.e.)
Hobbing allowance is reduced to 0.5mm each side by forging the tooth, the forged material weight will be less approx. 0.7 ~ 0.9kg, and the hobbing chips weight is reduced 50%.
The forged tooth contains the continuous metal fiber flow, which is said to have 20~30% more strength compared to fully-machined tooth.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM, and other required material can be applied.
Part Name Final Gear (Reduction unit)
Spec
  • Length
    20~60mm
    S
    L
  • Diameter
    φ160~220mm
    S
    L
  • Weight
    2.5~8kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Deep Hollow Long Shaft

These parts are formed by energy saving method, cold forging.

With deep hollow shape, we can suggest a shaft achieving high cooling performance.
Machining process can be also reduced by near-net shape, forged surface finish.

Capable with maximum ~400mm long shaft for hollow forming.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SC
Part Name Motor Shaft
Spec
  • Length
    ~400mm
    S
    L
  • Diameter
    φ30~80mm
    S
    L
  • Weight
    1~5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Inner Splined Shaft

Inner spline (inside bottomed hollow) can be formed by cold forging in shaft products.

Process reduced by forming both inner and outer spline at once.
Capable with spline and datum by machining or cold forging.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SC, and others
Part Name Output Shaft
Spec
  • Length
    100~600mm
    S
    L
  • Diameter
    φ30~60mm
    S
    L
  • Weight
    1~5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Flanged Shaft

Flange / gear can be formed on shaft with under-cut area, uniformed parts suggestion of the shaft and gear (flange).

Advantages of uniformed parts are:
Improve forged material yield
Reduce machining allowance
Omit assembly process

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SC, and others
Part Name Shaft with Gear
Spec
  • Length
    100~300mm
    S
    L
  • Diameter
    φ50~80mm
    S
    L
  • Weight
    1~5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Case with Boss Shape

Bossed shape case is used in planetary units.
Base plate and boss is uniformed by forging (instead of welding), which is strong enough to apply for parts receiving high torque.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SC, and others
Part Name Carrier, Planetary (Planetary Reduction Units)
Spec
  • Length
    35~120mm
    S
    L
  • Diameter
    φ100~170mm
    S
    L
  • Weight
    1~6kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

AUTOMOBILE TRANSMISSION

Round Chamfered Gear

These are the parts mainly used for transmission of the automobile.
High precision press formed by combination of hot and cold forging process.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM, and others
Part Name Sleeve Gear
Spec
  • Length
    20~50mm
    S
    L
  • Diameter
    φ60~120mm
    S
    L
  • Weight
    0.4~1.5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Thin Gear

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM, and others
Part Name Manual Clutch Gear (Automobile)
Spec
  • Length
    15~30mm
    S
    L
  • Diameter
    φ70~150mm
    S
    L
  • Weight
    0.5~2.5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Parking Gear

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM
Part Name Parking gear
Spec
  • Length
    30~150mm
    S
    L
  • Diameter
    φ90~190mm
    S
    L
  • Weight
    0.5~7kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Cylinder Sheave

This part is used in hydraulic system for CVT (automobile transmission).
Meeting high requirements from customers by obtaining strength and improved yield with forging, and high precision finishing with machining.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC
Part Name Cylinder Sheave
Spec
  • Length
    ~mm
    S
    L
  • Diameter
    φ~mm
    S
    L
  • Weight
    ~kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

AUTOMOBILE CHASSIS

Randum Pitch Tooth

Randum pitch tooth is applied for Variable Gear Ratio (VGR) steering rack bar.

Randum pitch tooth is difficult to form by machining process, but can be precisely formed by warm forging.
Such high precision forged gear is produced in the dedicated production line.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V
Part Name VGR (Variable Gear Ratio) Steering Rack Bar
Spec
  • Length
    500~800mm
    S
    L
  • Diameter
    φ20~32mm
    S
    L
  • Weight
    2~5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Axle Shaft

Forging Method
  • HOT
  • WARM
  • COLD
Material SC
Part Name Axle Shaft (Automobile)
Spec
  • Length
    600~700mm
    S
    L
  • Diameter
    φ125~190mm
    S
    L
  • Weight
    1.6~10kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Hub

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SC, SC-V, and others
Part Name Hub
Spec
  • Length
    80~140mm
    S
    L
  • Diameter
    φ100~220mm
    S
    L
  • Weight
    1~8kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Triple Clamp

Forging Method
  • HOT
  • WARM
  • COLD
Spec
  • Length
    ~mm
    S
    L
  • Diameter
    φ~mm
    S
    L
  • Weight
    ~kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Boss Part

Applied for joint parts such as drive shaft.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V
Part Name Joint Yoke (Automobile)
Joint Flange (Automobile)
Spec
  • Length
    60~100mm
    S
    L
  • Diameter
    φ60~120mm
    S
    L
  • Weight
    0.5~1.5kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Large Randum Boss Part

Large size complicated shape can be formed by forging.
Applied for important safety parts of automobile chassis.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC-V
Part Name Steering Knuckle (Automobile)
Spec
  • Length
    150~350mm
    S
    L
  • Diameter
    φ150~350mm
    S
    L
  • Weight
    5~16kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

AUTOMOBILE ENGINE

Small Round Parts (Retainer)

These small size retainers are used to connect the engine valve and the valve spring.
Applied to various engines for automobile, motorcycle, agriculture machine, and other general-purpose engines.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM
Part Name Valve Spring Retainer (Automobile, Motorcycle, Agriculture)
Spec
  • Length
    6~11.5mm
    S
    L
  • Diameter
    φ16~30mm
    S
    L
  • Weight
    0.005~0.03kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Connecting Rod

Connecting rod, or Con rod in short, is the part connecting the piston and crankshaft of the piston engine.
Its function is to convert the reciprocating motion of the piston into the rotation of the crankshaft, which both light weight and strength are required in heigh level.
Gohsyu connecting rod is available in two types:
- Separate type, two forged parts of each cap and rod
- Uniform type, forming cap and rod as one part.

Various material and heat treatment are available, optimized suggestion shall be made based on requirements of the mechanical property.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, and others
Part Name Connecting Rod / Con Rod (Automobile, Motorcycle, Agriculture)
Spec
  • Length
    115~300mm
    S
    L
  • Diameter
    φ~mm
    S
    L
  • Weight
    0.3~3kg
    L
    H
  • Tensile Strength
    820~1030MPa
  • Surface Hardness
    HB255~310

Crankshaft

Crankshaft formed by hot forging, applied for motorcycle, agriculture, and general-purpose engines.
Available in two types:
- Uniformed type
- Separate type (for single cylinder)

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, SCM, and others
Part Name Crankshaft (Motorcycle, Agriculture, Robots)
Spec
  • Length
    150~400mm
    S
    L
  • Diameter
    φ40~120mm
    S
    L
  • Weight
    0.5~10kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Delivery Pipe / Common Rail

Delivery pipe and Common rail parts applied for fuel injection system of automobile, motorcycle, agriculture and general-purpose engines.

Available with various material choice, carbon steel, SCM, and micro alloy.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, SCM
Part Name Common Rail
Spec
  • Length
    260~500mm
    S
    L
  • Diameter
    φ15~42mm
    S
    L
  • Weight
    1.5~7kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

SUS (Stainless) Part

Stainless is a high anti-rust metal and often applied for liquid related parts.
It's hard than regular steel used for forging, which require higher load of pressing. Thus, die control to minimize die wear issue is very important.

Also near-net-shape forging shall bring several advantages of:
1. Improved yield reducing material usage and save cost, where SUS material is expensive than steel.
2. Reduce machining process load where SUS is hard and more difficult to machine than steel.

Forging Method
  • HOT
  • WARM
  • COLD
Material SUS
Part Name Engine related parts (Automobile)
Spec
  • Length
    40~60mm
    S
    L
  • Diameter
    φ50~100mm
    S
    L
  • Weight
    0.5~1kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

AGRICULTURE

Small Round Parts (Retainer)

These small size retainers are used to connect the engine valve and the valve spring.
Applied to various engines for automobile, motorcycle, agriculture machine, and other general-purpose engines.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCR, SCM
Part Name Valve Spring Retainer (Automobile, Motorcycle, Agriculture)
Spec
  • Length
    6~11.5mm
    S
    L
  • Diameter
    φ16~30mm
    S
    L
  • Weight
    0.005~0.03kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

Connecting Rod

Connecting rod, or Con rod in short, is the part connecting the piston and crankshaft of the piston engine.
Its function is to convert the reciprocating motion of the piston into the rotation of the crankshaft, which both light weight and strength are required in heigh level.
Gohsyu connecting rod is available in two types:
- Separate type, two forged parts of each cap and rod
- Uniform type, forming cap and rod as one part.

Various material and heat treatment are available, optimized suggestion shall be made based on requirements of the mechanical property.

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, and others
Part Name Connecting Rod / Con Rod (Automobile, Motorcycle, Agriculture)
Spec
  • Length
    115~300mm
    S
    L
  • Diameter
    φ~mm
    S
    L
  • Weight
    0.3~3kg
    L
    H
  • Tensile Strength
    820~1030MPa
  • Surface Hardness
    HB255~310

Crankshaft

Crankshaft formed by hot forging, applied for motorcycle, agriculture, and general-purpose engines.
Available in two types:
- Uniformed type
- Separate type (for single cylinder)

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, SCM, and others
Part Name Crankshaft (Motorcycle, Agriculture, Robots)
Spec
  • Length
    150~400mm
    S
    L
  • Diameter
    φ40~120mm
    S
    L
  • Weight
    0.5~10kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

INDUSTRIAL ROBOT

Crankshaft

Crankshaft formed by hot forging, applied for motorcycle, agriculture, and general-purpose engines.
Available in two types:
- Uniformed type
- Separate type (for single cylinder)

Forging Method
  • HOT
  • WARM
  • COLD
Material SC, SC-V, SCM, and others
Part Name Crankshaft (Motorcycle, Agriculture, Robots)
Spec
  • Length
    150~400mm
    S
    L
  • Diameter
    φ40~120mm
    S
    L
  • Weight
    0.5~10kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

INFRASTRUCTURE

Nut (Large Size)

Large size nut with high strength can be formed by hot forging.

Forging Method
  • HOT
  • WARM
  • COLD
Material SCM
Part Name Nut (Large Size)
Spec
  • Length
    50~100mm
    S
    L
  • Diameter
    φ60~180mm
    S
    L
  • Weight
    2~8kg
    L
    H
  • Tensile Strength
    ~MPa
  • Surface Hardness
    HB~

MEDICAL

Magnesium Pipe

The lightest metal Mg is sensitive and less strength, difficult to utilize as plastic forming material.
Gohsyu's plastic forming technology enabled to add high strength, ductibility, gloss finish, and corrosion resistance on Mg material forming by micronizing the crystal
grain.
Sample available not only as pipe but other shapes.

Forging Method
  • HOT
  • WARM
  • COLD
Material Mg
Part Name Mg pipe (Medical)
Spec
  • Length
    ~2000mm
    S
    L
  • Diameter
    φ1.6~5.0mm
    S
    L
  • Weight
    ~kg
    L
    H
  • Tensile Strength
    ~300MPa
  • Surface Hardness
    HB~

NEW ITEM INQUIRIES ALSO WELCOME!

GOHSYU have total development process in-house from die designing to manufacturing.
If you have any difficulty on product not found in our current product list, we are pleased to receive your contact.

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