KNOWLEDGE

Asia's Leading CNC Machine Metal Lathe Turned Parts Manufacturer E&H Precision explains basic knowledge of machining process as well as cost reduction idea from 40 years+ of experience in the metalworking industry.

Vocabulary

How each Cutting Tool on Lathing machines works?

A cutting tool is a tool used to cut or shave metal into a certain shape. A cutting tool itself is harder than the object to be shaped,...

How each Cutting Tool on Lathing machines works?

What is "Cutting Coolant Fluid" for?

Cutting fluid is a liquid that is released towards cutting tools when metal materials are being machined during production, such as on a...

What are ”Spindle types” for CNC turning machines?

In turning, cutting is performed by pressing a cutting tool against a material that is rotating with the spindle. Automatic lathes can be...

What is "Turning / Lathing" ?

Lathe turning is a type of cutting process that involves machining a raw material. It is a machining method in which a cutting tool...

What is "Counterboring / Countersinking" ?

Counterboring (also called Countersinking) is a necessary process to prevent bolts and screws from loosening, improve aesthetics, and...

Cost Reduction Idea

Changing Hole End Angle

The metal lathe parts such as Pistons, Valves or Nozzles where those products have stop boring hole, if the specified angle of stop...

Changing the Angle Indication of Clearance Groove

When you design clearance groove for the cylindrical lathe parts such as Shafts, Piston, Valves or Nozzles produced from metal rods, If...

Changing the Angle Indication of Clearance Groove

Securing Sufficient Pilot Hole Length for Threading

When there are Lathe parts such as Rollers, Pistons or Valves that require Threading inside Boring hole, Special cutting tools are...

Securing Sufficient Pilot Hole Length for Threading

Machining on Raw Material Surface

If there is “Machined Surface Required” or “Specific Surface Roughness” mentioned on the drawing for the Turning Shafts, Roller, Pistons...

Securing Clearance for Thread

Lathe Parts such as Shafts, Rollers, Pistons or Pins that have thread, “Effective Thread Length” like Y in the upper picture is not...

Changing Radius Size on Corners

The Lathe Parts like Pins, Pistons, Valves or Shafts, If the size of radius corners are small like 0.1 or 0.05 as the upper picture, then...

Changing Radius to Chamfer on corners

Lathe Products such as Pistons, Shafts or Pins have some corners which requires “Radius” shape as the upper picture. Producing “Radius”...

Allowing the drill tip at counterbore

Some lathing products such as Pistons or Pins have counterbores, and the end surfaces of counterbores are required to be flat as the...

Stepped drill surface on through-hole

Some lathing products such as Pistons, Valves or Collars require to have through-hole at the center, and drilling process to produce such...

Eliminating stepped surfaces

Machining 90-degrees steps like the upper picture on cylindrical turned parts such as shafts, rollers and pistons need extra cutting tool...

Angled shape of bottom of the hole

When boring the hole on cylindrical shape machining products such as bolts, valves or pins, boring the hole as flat end at the bottom...

Machining diagonal corners on hexagonal material

Clamping the hexagonal material with diagonal corners would not make positional accuracy of boring inner diameter since material surface...

Machining diagonal corners on hexagonal material

Adding V-shape Groove on Milling End

Having a flat end on milling is likely to produce burrs, and it gives us additional costs such as frequent milling cutter replacement,...

Radial milling end shape

Milling process is often done by milling cutter and its shape is radial, however some drawing says milling end shall be “straight” as the...

Adding Clearance Groove at the end corners for Grinding

When the machined products such as Shafts, Valves, Pistons or Rollers that require external diameter grinding, the grinding operations...

Adding Clearance Groove at the end corners for Grinding

Optimal diameter of knurled products

Regarding the “knurled“ turned parts such as Shafts, Pins or Rollers, in some products require grinding as the pictures. If diameter A <=...

Changing the corner Shape of Knurling

Machining products such as Shafts, Pins or Rollers where Knurling is done on “Chamfered” corner, it is likely to have burr on the corner...

Broaching dimension optimization

One of major trouble when broaching on the lathe-turned parts like shafts, pin, are too shallow depth of the pilot hole (shown “Z” in the...

Changing Solid Rods to Pipe material

Producing the machined products that have a hollow through-hole from Solid Rods material, it is necessary to drill the through-hole from...

Changing Carbon steels to free-cutting steels

Carbon Steel S10C in JIS, AISI 1010 or C10 in ISO has difficulty in breaking up cutting chips during machining process, and it worsens...

Changing to Annealed raw material

Annealing or magnetic annealing shall be done after machining process to stabilize the magnetic properties for some magnetic stainless...

Adding Copper on Stainless steel material

Stainless steel SUS303 in JIS, or X10CrNiS18-9 in ISO 15510 or EN 1.4305 or AISI 303 are often used for shafts as free-cutting stainless...

Changing corner shape for symmetrical turned parts

To prevent wrong orientation in assembly process, some turned parts such as pipes, collars or sleeves are designed symmetrically with...

Changing corner shape for symmetrical turned parts

Plating type changes for iron steel products

Some iron steel products are required to get electroless nickel plated to to ensure rust prevention. Electroless nickel plating is...

Grinding after machining process, instead of using ground material

Some products such as shafts and pistons that require precision tolerances in surface roughness and cylindricity. In some cases ground...

Material cost reduction through applying plating

Stainless steel is generally used for parts that require corrosion resistance, but stainless steel is expensive. In the case of products...

Plating improvement by product design change

If there is a stop hole(Upper picture) in the machined parts such as shafts and valves to be plated, it is difficult for the plating...

Plating improvement by product design change

Removing topological phase relation notation on drawing

There are cases where "topological phase relation" such as D-shape milling surface is indicated on cylindrical shape parts such as...

Removing topological phase relation notation on drawing

Thread Rolling / Knurling

Threading by machining can produce a high-precision screws, however the machining time is longer which resulting in higher production...

Cost Reduction Idea