PRODUCTS
(BY SHAPE)

GEAR

SHAFT

LONG BAR SHAPE

ROUND COMPLICATED SHAPE

OTHER COMPLICATED SHAPE

NON STEEL (Mg, SUS)

GEAR

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~

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~

SHAFT

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~

LONG BAR SHAPE

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~

ROUND COMPLICATED SHAPE

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~

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~

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~

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~

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~

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~

OTHER COMPLICATED SHAPE

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~

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~

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~

NON STEEL (Mg, SUS)

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~

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~

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.

from INQUIRY to SUPPLY

contact

We are pleased to receive your contact on
forging production and parts.
Your requests and questions are
more than welcome!

SEND YOUR REQUEST

+81 (748) 77 3110

PRODUCTS (BY SHAPE)

GEAR

Helical Tooth Forged Gear

Round Chamfered Gear

Thin Gear

SHAFT

Deep Hollow Long Shaft

Inner Splined Shaft

Flanged Shaft

LONG BAR SHAPE

Randum Pitch Tooth

Axle Shaft

ROUND COMPLICATED SHAPE

Parking Gear

Case with Boss Shape

Cylinder Sheave

Hub

Nut (Large Size)

Small Round Parts (Retainer)

OTHER COMPLICATED SHAPE

Connecting Rod

Crankshaft

Crankshaft

Delivery Pipe / Common Rail

Triple Clamp

Boss Part

Large Randum Boss Part

NON STEEL (Mg, SUS)

Magnesium Pipe

SUS (Stainless) Part

NEW ITEM INQUIRIES ALSO WELCOME!

from INQUIRY to SUPPLY

contact

PRODUCTS
(BY SHAPE)