Technical Information

This section gives a description of using insert nut. And this section continues to update additions in order of customer’s requests.
(Requests are here)

Precautions

1. Jack Out –Torque

Under the below condition, insert nut is coming out.

	Status	Schematic Drawing
Normal status	The hole of the tightened object is smaller than outer diameter of insert, and the object and insert touches each other.
Caution required status	If the hole of the tightened object is larger than outer diameter of insert nut, insert is coming out.
	If soft objects such as robbers are tightened, the insert is coming out.

※Even if the case of the above three figures, it is possible to carry out. If large force is not applied, consider the flange type.

2. Resin hole is too deep.

When resin hole is too deep, make steps inside the hole or consider flange type such as the right figure. Flange type is available for each after-molding insert.

3. Cautions on inner-diameter of insert

Inner-diameter of the insert is made along “JISⅡ.” At molding, when pin is used at inner-diameter, follow the below method. 1.Match the pin with the shortest one of “JISⅡ” 2.Contact us about ”Inner-diameter.”

4. Strength of Insert Nut

Strength of insert nut varies with using condition such as inserting method, parental material, hole-diameter of parent material, and shape of parent material.
強About the strength, determine to use after test.

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How to Install

As insert nut’s using situation or its purpose has been diverse, how to install has also been diverse.
However, insert nut itself is only two types in a wide range, such as “After-molding insert ” and ”Molding insert.” How to install “after-molding insert” has “expansion method,” ”press fit,” and ”thermocompression.”
And “molding insert” is used in a situation of molding.

1. After-molding Insert

Method	Features	Products	Image
Expansion	Do not use a heat source Outer periphery of resin hole is not matter because of the insert expansion Punch is necessary to push down the insert.	Dodge type SD　FD
Press fit	Do not use a heat source This method is mostly used among installing methods. Making boss diameter bigger prevents cracking. (If arranging the boss diameter is not possible, use thermocompression method.)	Bit type SB　FB
Thermocompression	Use a heat source Resin hole is not matter Heating machine is necessary.	Ultra type UD　FD Bit type SB　FB

2. Molding Insert

Method	Features	Products	Imsge
Use at molding	Use at molding Part that assemblies insert at the mold is required. （(if you use a pin mold part assembling, please note the pin diameter.) Because melting resin is wrapped into the insert, strength is forced.	Molding type Parallel Cross

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Machining Tolerance・Inner diameter size

1. Tolerance of machining measurement

Without customer’s request, tolerance is made along JIS: middle grade (the 2nd grade.) Details are below.

①Tolerance to the measurement except beveling part.(mm)

②Tolerance to the measurement of beveling part (mm)

③Tolerance of the angle measurement (mm)

2. Resin Hole Inner Diameter Measurement

Without customer’s request, tolerance is made along JIS: middle grade (the 2nd grade.)
If the customer dose use the molding insert nut and dose not request inner-diameter, molding pin measurement is refered to "min" on the below table.

Metric parallel-knurling thread

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Material of Insert Nut

Without customer’s request, our insert nut is made of brass (C3604BDF)
The below information is confirmed by millsheet at the material receiveing.
Also, since November 2001, earth friendly new alloy → low lead or more anticorrosion material has been used. Free to contact us.

1.Normail material→Brass(C3604BDF)
2.Earth friendly-material→Low lead Brass (BZ5)

1. Brass(C3604)

Material Feature

C3604 is also called Brass, and it is an excellent machinability and ductility. It is widely used, such as bolt, nut, small thread, spindle, gear, valve, lighter, watch, and camera parts. It is currently outstanding to be used as IT equipments or transformation parts.
BDF means B(Bar material), D(Drawing material), F(Fabrication .)

Material Comparison

Material Quality

2. Lead Free Alloy C6801

Material Quality

1.Chemical Composition (compared to C3604) wt.%

2. Mechanical Property (compared to C3604)

3. Physical Properties (Compared to C3604)

※The above date is a measured value, and not guaranteed value.

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Plastics Classification

Plastic (resin)is divided into “thermoplastic” & ”thermosetting.”
These resins are clearly differentiated when heat is applied.
The differences are on the below.

Resin differences

Generally, thermoplastic resin is for after-molding insert, and thermosetting resin is for molding insert.
However, there is thermosetting resin for after-molding insert.

Correspondence table and insert plastic

Resin List

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How to wash

We insert, free use for our customers at ease, do washing twice for all products before shipment.
The washings are aware of the global environment "hazardous substance" of no use to occur.

Our flow production

Shape Processing

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Primary washed (Multi-tank solvent washing machine)

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Complete cleaning (washing machine type water multi-tank)

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Packaging Shipping

1. Multi-tank solvent washing machine

Multi-tank solvent washing machine

Washing basket

2 washing machine type water multi-tank

1.Entering the product to the washing basket
2.Set to the washer
3.Fully automatic operations Washing machine type water tank 6

4.Cooling basket
5.Fetch product

washing machine type water multi-tank

washing bascket