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
Part Name	Final Gear (Reduction unit)

Spec	Length 20~50mm S L Diameter φ160~220mm S L Weight 4~6kg L H Tensile Strength ~MPa Surface Hardness HRC~

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
Part Name	Sleeve Gear

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Thin Gear

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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, SCM
Part Name	Motor Shaft

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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, SCM

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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, SCM

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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 2~3.5kg L H Tensile Strength ~MPa Surface Hardness HRC~

Axle Shaft

Forging Method	HOT WARM COLD
Material	SCR, SCM
Part Name	Axle Shaft

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

ROUND COMPLICATED SHAPE

Parking Gear

Forging Method	HOT WARM COLD
Material	SCR, SCM
Part Name	Parking gear

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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
Part Name	Carrier, Planetary (Planetary Reduction Units)

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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	SCR, SCM
Part Name	Cylinder Sheave

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Hub

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Nut (Large Size)

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

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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 ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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.

Forging Method	HOT WARM COLD
Material	SCR, SCM
Part Name	Connecting Rod / Con Rod (Automobile, Motorcycle, Agriculture)

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Crankshaft

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

Forging Method	HOT WARM COLD
Material	SCR, SCM
Part Name	Crankshaft (Motorcycle, Agriculture)

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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

Spec	Length 260~500mm S L Diameter φ15~42mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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 HRC~

Boss / Flanged Part

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Large Randum Boss Part

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

Flow Forming Part

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

NON STEEL (Mg, SUS)

Magnesium Pipe

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 HRC~

SUS (Stainless) Part

Forging Method	HOT WARM COLD

Spec	Length ~mm S L Diameter φ~mm S L Weight ~kg L H Tensile Strength ~MPa Surface Hardness HRC~

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

Delivery Pipe / Common Rail

Triple Clamp

Boss / Flanged Part

Large Randum Boss Part

Flow Forming Part

NON STEEL (Mg, SUS)

Magnesium Pipe

SUS (Stainless) Part

NEW ITEM INQUIRIES ALSO WELCOME!

from INQUIRY to SUPPLY

contact

PRODUCTS
(BY SHAPE)