Yamawa Manufacturing Co.,Ltd. List of Products and Services

YAMAWA will respond to inquiries received from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry I am processing through holes with a spiral tap, but I am experiencing issues with chips getting stuck. Is there any good countermeasure for this? *For more details, please refer to the PDF document at the link below.

• Tap

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I was told it is a pipe tap PT 15A, but do you know the dimensions? *For more details, please refer to the PDF document at the link below.

• Tap

YAMAWA will respond to inquiries from customers. This document also includes detailed explanations. [Contents] ■Inquiry What is a bicycle screw? *For more details, please refer to the PDF document at the link below.

• Tap

YAMAWA will respond to inquiries received from customers. This document also includes detailed explanations. [Contents] ■Inquiry Please tell me the basic considerations and precautions when using carbide taps. *For more details, please refer to the PDF document at the link below.

• Tap

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received instructions from our parent company to use the "ichirin buto" tap with SP M16×2. What kind of tap is this? *For more details, please refer to the PDF document linked below.

• Tap

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry Do you sell taps for helicoils? *For more details, please refer to the PDF document at the link below.

• Tap

This document covers "Setting the Tap Oversize Amount to Match the Plating Cost for Internal Threads." It introduces the relationship between the plating thickness and effective diameter when plating internal threads, as well as the general setting procedure for plating taps and a precision setting consideration diagram for M6×1 plating taps. [Contents] ■ Relationship between plating thickness and effective diameter when plating internal threads ■ General setting procedure for plating taps ■ Precision setting consideration diagram for M6×1 plating taps (Plating thickness: 8–16μm) *For more details, please refer to the PDF document or feel free to contact us.

• Tap

YAMAWA will respond to the inquiries received from customers. This document also includes detailed explanations. [Contents] ■Inquiry I was asked for a middle tap with "11 threads at 5/8" for a hand tap. Can you understand this from just that? *For more details, please refer to the PDF document linked below.

• Tap

The "screw thread" consists of five main elements: outer diameter, effective diameter, root diameter, thread angle, and pitch. In this technical document, we provide detailed information on the "five main elements of screw threads," as well as "important effective diameters," "overall effective diameters," and "pitch errors." [Contents] ■ Five main elements of screw threads ■ Important effective diameters ■ Overall effective diameters ■ Pitch errors ■ Half-angle errors of the thread crest *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

Screws have a "fastening function" that tightens and a "feeding function" that delivers accurately, both of which are effective when the flank surfaces of the external and internal threads are in surface contact. This document explains the three factors that determine whether the flank surfaces are in surface contact: "effective diameter, thread angle error, and pitch error." Additionally, it includes measuring tools for determining the quality of screws, such as "thread gauges." Our company continues to propose product developments based on the materials being machined and appropriate usage methods for taps, dies, and center hole drills to establish safe screws. [Contents] ■ About effective diameter, thread angle error, and pitch error ■ About thread gauges ■ Comparison of ideal acceptable internal threads and unsafe acceptable internal threads *For more details, please refer to the PDF document or feel free to contact us.

• nut
• bolt
• Other machine elements

I will introduce the relationship between "screw grade and fit length." The grade of a screw is determined by the relationship between the "fit classification" and the "fit length." Since the screw grade indicates the position of the tolerance, selecting the appropriate grade and effectively utilizing the tolerance leads to stable processing. 【Examples of Fit Classification Application】 ■ Precision - Especially for precision screws with minimal play ■ Medium - General-purpose screws used in machinery, instruments, structures, etc. ■ Coarse - Screws used in environments prone to dirt and scratches, such as in construction work and installation, or screws that are difficult to process, like those threaded onto hot-rolled bars or those threaded into long blind holes. *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

The engagement rate of the female thread refers to the percentage of the actual engagement height compared to the reference engagement height. "Actual engagement height / Reference engagement height × 100%" This technical document includes information on the "engagement rate" and also introduces a simple calculation formula. 【Contents】 ■ What is the engagement rate of the female thread ■ Calculation formula for the engagement rate based on the screw hole diameter and female thread ■ Reference engagement height ■ Hole diameter table (main 7 dimensions) *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

The engagement rate of male and female threads refers to the percentage of the actual engagement height compared to the standard engagement height. "Actual engagement height / Standard engagement height × 100%" The "fit strength" of male and female threads is also influenced by the relationship (engagement rate) between the outer diameter of the male thread and the inner diameter of the female thread. This technical document covers the "engagement rate." It also provides detailed information about the standard engagement height and more. [Contents] ■ What is the engagement rate of male and female threads ■ Standard engagement height ■ Supplementary explanation *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

Normal female threads will stop within two rotations of the stop screw gauge. However, issues such as misalignment of the spindle, spindle runout, and the use of worn taps can lead to problems like "enlargement due to excessive cutting at the mouth," "enlargement due to insufficient cutting edge resulting in thread skipping," and "enlargement due to poor feed balance (excessive or insufficient cutting)." This technical document provides detailed information on the causes of "female thread" enlargement and examples of countermeasures. [Contents] ■ Trouble items ■ Main suspected causes ■ Checkpoints and improvement suggestions *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

This document is a technical material published by Miman Manufacturing Co., Ltd. It explains the feeding mechanism and features of the machine, as well as the tendencies of the tap's self-guiding properties. [Contents] ■ Feeding mechanism and features of the machine ■ Features of the holder ■ Tendencies of the tap's self-guiding properties *For more details, please refer to the PDF document or feel free to contact us.

• Other cutting tools

This document covers "surface treatment of taps." Taps are subjected to suitable surface treatments based on the characteristics of various surface treatments and their respective applications. Here, we introduce "oxidation treatment." [Contents] ■ Oxidation treatment ■ Oxide film thickness and treatment time ■ Effects of oxidation treatment *For more details, please refer to the PDF document or feel free to contact us.

• Tap

This document discusses "the causes and mechanisms of runout enlargement." It introduces issues such as runout, misalignment, and the inclination/bending of pilot holes, as well as cutting with taps that are unsuitable for the workpiece and cutting under conditions where the tap's cutting ability has deteriorated. 【Contents】 ■1. Runout, misalignment, and inclination/bending of pilot hole cutting ■2. Cutting with unsuitable taps for the workpiece and cutting under conditions where the tap's cutting ability has deteriorated *For more details, please refer to the PDF document or feel free to contact us.

• Tap

This technical document provides information about Unified screws used for aircraft, specifically "UNJ screws." It details the features of UNJ screws, standard thread profiles, and screw pilot hole diameters, offering a comprehensive overview of the product. [Contents] - Features of UNJ screws - Standard thread profiles of UNJ screws - Screw pilot hole diameters *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

This technical document covers "tapping torque." It introduces tapping torque for cutting processes, as well as torque diagrams tested with hand taps, spiral taps, and point taps, and explains the calculation method for tapping torque of roll taps. [Contents] ■ Tapping torque for cutting processes ■ Tapping torque diagrams ■ Comparison of tapping torque by type of tap ■ Tapping torque for forming processes (roll taps) ■ Calculation method for tapping torque of roll taps *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap
• Other cutting tools

This technical document provides guidelines on "tapping speed." Tapping speed is influenced by factors such as the type of tap, the number of flutes, the material, the type of workpiece, the shape of the pilot hole, and the cutting oil used, so careful consideration is necessary when making a selection. Please make use of this document. [Contents] ■ Tapping Speed ■ Calculation Formula *For more details, please refer to the PDF document or feel free to contact us.

• Tap
• Other cutting tools

This technical document covers "fitting length." Typically, the tolerance class of screws is selected considering the "fitting category" and "fitting length." To perform screw machining stably, it is necessary to fully understand this relationship and select the appropriate tolerance class for screws. 【Contents】 1. Fitting categories 2. Categories of fitting length 3. Selection criteria for internal and external threads - Selection criteria for internal thread tolerance class - Selection criteria for external thread tolerance class 4. Fitting length *For more details, please refer to the PDF document or feel free to contact us.

• Tap
• Other cutting tools

This technical document introduces "the grades of internal threads and the grades of taps." It includes information on the effective diameter tolerance range of P-grade taps based on nominal diameter and pitch, as well as a comparison table of the effective diameter tolerance ranges for taps intended for the American market, P-grade Yamawa, and Unified internal thread grades. 【Contents (excerpt)】 ■ Yamawa P-grade precision ■ Effective diameter tolerance range of P-grade taps based on nominal diameter and pitch ■ JIS precision ■ Comparison table of effective diameter tolerance ranges for tap grades and internal thread grades ■ Standard grades and oversized, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap
• Other cutting tools

This document discusses "roll taps." "Roll taps" are tools for processing internal threads using a plastic processing method. In recent years, they have been widely used due to the diversification of processed materials and the trend towards lighter and smaller components, gaining popularity. We will provide detailed information about their features, usage conditions, and precision. [Contents (excerpt)] ■ Features of roll taps ■ Points to consider when using roll taps ■ Selection of "Yamawa roll taps" ■ "Internal thread shapes" and "engagement rates" based on pilot hole diameter ■ Usage conditions for taps, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Tap
• Other cutting tools

This document is a technical material published by Miman Manufacturing Co., Ltd. Since our establishment, we have continuously adopted and researched suitable high-quality materials. It explains the current standard materials in use, as well as trends in tool materials. [Contents] ■ Materials Used ■ Trends in Tool Materials ■ JIS Chemical Components *For more details, please refer to the PDF document or feel free to contact us.

• Other cutting tools

This technical document covers the "combination of machine (feeding mechanism), holder, and tap." Based on the characteristics of the machine's feeding mechanism and the holder, we introduce suitable taps. Please use this for selecting taps. [Contents] ■ Characteristics of the machine's feeding mechanism ■ Characteristics of the holder ■ Trends in the self-guiding properties of taps *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

This technical document covers "Countermeasures for Tapping Troubles." It provides detailed measures for various trouble items such as "breakage," "abnormal wear," "reduction of internal threads," "roughness/defects of internal threads," and "stripping." [Contents: Trouble Items] ■ Breakage ■ Abnormal Wear ■ Reduction of Internal Threads ■ Roughness/Defects of Internal Threads ■ Enlargement of Internal Threads *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

This technical document covers "the accuracy of external threads and the accuracy of dies." [Contents] ■ Accuracy of external threads ■ Accuracy of dies ■ Grades and applications of dies *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools

This technical document covers the "Names of Various Parts of Taps." Additionally, it introduces topics such as "Relief for Engaging Parts," "Relief and Flank Angle of Threaded Areas," and "Engaging Parts of Hand Taps." 【Contents】 ■ Names of Various Parts ■ Relief for Engaging Parts ■ Relief and Flank Angle of Threaded Areas ■ Engaging Parts of Hand Taps *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

This technical document covers "the grooves of taps." The main roles of the grooves of taps are (1) accumulation of chips, (2) supply route for lubricants, (3) formation of cutting angles, and (4) related to the number of engaged flutes, which is considered in determining the cutting allowance, making it a very important aspect. Additionally, we also introduce the classification of grooves. [Contents] ■ Main roles of the grooves of taps ■ Classification of grooves *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

This technical document covers "the tool angles and cutting allowances of taps." It provides detailed information, along with diagrams, about the cutting angles, rake angles, and tangential hook angles, as well as the relief angles of the engagement area and the cutting allowances of taps. [Contents] - Cutting angles and relief angles of the engagement area - Thread relief - Cutting allowances of taps *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

In recent years, the machines used for tapping have become specialized, automated, and have adopted NC machines and machining, leading to labor-saving advancements. In response to this era, we recommend our carbide taps, which are well-received for mass production and cost reduction. When used properly, they have been proven to have over 50 times the durability compared to standard HSS taps. The material of the carbide taps is carefully selected, using ULTRA-FINE-GRAIN-CARBIDE made from ultra-fine tungsten carbide and high cobalt, which are deemed suitable for taps. [Contents] ■ Features of Yamawa carbide taps ■ Points to note during use ■ Examples of main work materials, cutting speeds, and cutting oils ■ Hardness and toughness of carbide and HSS materials ■ Comparison of thread count and wear amount of engagement parts between carbide taps and HSS taps ■ Examples of carbide tap usage and lifespan comparison *For more details, please refer to the PDF materials or feel free to contact us.

• Other work tools
• Tap

This technical document covers "taps for pipe threads." It includes a correspondence table for the symbols of "JIS taps for pipe threads," a comparison table of the accuracy of the threaded sections of taps for parallel pipe threads, as well as information on the accuracy of the threaded sections of "American taps for pipe threads" and American dry seal pipe taps. 【Contents (excerpt)】 ■ JIS taps for pipe threads - Correspondence table for symbols - Classification of pipe threads and their relationship with taps - Relationship between the effective diameter tolerance range of threads and taps - Comparison table of the accuracy of the threaded sections of pipe taper taps - Comparison table of the accuracy of the threaded sections of taps for parallel pipe threads, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• Tap

The technical document covers "Metric Threads and Thread Gauges." It provides a detailed explanation of external threads and their limit gauges, as well as internal threads and their limit gauges, using diagrams. [Contents] ■ External Threads and Limit Gauges for External Threads ■ Internal Threads and Limit Gauges for Internal Threads *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools