Cold Heading Parts_Chonghong Industries(Microwork) Ltd.

Cold Forging Bolts

Cold forming or cold heading, is a manufacturing process where metal is worked at room temperature to create components and finished products,and is used to make a variety of goods including fasteners, car parts, and building supplies.

Cold forming has more advantages to other machining processes, such as screw machining.It poses

    Less waste

    Faster production

    Stronger parts

    Reduced costs

    Tight tolerances and critical specs

Material: Carbon Steel, Stainless Steel, Brass,Bronze Aluminum

Tolerances:0.02mm in diameter,0.1mm in length

Machining Process:

Cold Forging, Cold Heading

Roll forming

Roll threading,

Tapping

Broaching

Grinding

Turning/Shaving

Slotting/Sawing

Reheading

Knurling

Finishing

Burnishing

Assembly

Trimming

Drilling

Milling

Flattening

Min. Order: 100-50000 pcs (or negotiable)

Surface Treatment: Polishing, Heat Treatment, Sand Blasting, Zinc Plated, chemical Film,

Packing: Carton Box, Blister tray, Pallet, Wooden Case.

Certificate:ISO9001:2008

Custom Cold Heading Parts Application:

Systems of Suspension, Brake, Engine, Clutch, Chassis, Exhaust, Cable and many other industries.

Such as:

Application: Airbag mount assembly
Component: Attachment pin

Application: Automotive brake assembly
Component: Piston rod

Application: Door lock
Component: Dead bolt

Application: Steering system
Component: Shaft with involute spline

Application: Motorcycle wheel assembly
Component: Internally-threaded fastener for
attachment of wheel spokes to tire rim

Application: Automotive engine assembly
Component: Pipe plug housing requiring smooth threads
to accept O-ring assembly; also, bottom of cup must be
flat to .05" and first step in cup must be smooth

Application: Commercial air conditioner
Component: Valve stem

Machining Tolerances

Normally the diameters tolerance is ± 0.05mm. Length tolerance is ±0.1mm.on demands, we can also achieve: diameters tolerance is ±0.02mm.Length tolerance is ±0.05mm Material Selection: Normally used carbon steel 35# or 45# ,Stainless Steel:304 or 316.According to customer requirement use Aluminum and Brass

Surface Treatment

Heat treatment, Zinc Plated, Zinc-Nickel Alloy Plated, Chrome Plated

Below pictures are just very few parts which we present as a brief show,in fact,we have made more than several thousand types of custom forging parts for customers world wide

We have following bolts available

Hex Bolts

Flange Bolts

U Bolts J Bolts

D Head Bolts

Socket Shoulder Bolts

Heavy Hex Bolts

Socket Head Bolts

Con Rod Bolts

Crank Shaft Bolts

Cylinder Head Bolts

Flywheel Bolts

Gear Flange Bolts

Long Bolts

Main Bearing Cap Bolts


Adjusting Stud Bolt	Long Bolts

	Car Seat Adjusting Bolt

Flange Bolts	Round Head Special Bolt

Threaded Stud Bolt	Main Bearing Cap Bolts

Cylinder Stud Bolt	Speciality Bolt