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

YAMAWA will respond to the inquiries received from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry I am processing a spiral tap M12X1.75 at the recommended cutting speed of 7m/min. What should the feed rate for the spindle be set to on the machine? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document also includes some minor speculations. 【Contents】 ■Inquiry I know how to express unified screws like "1/4-20UNC" and "1/2-13UNC" in inches. For the "1/4-20UNC" external thread, I understand that the outer diameter reference dimension is 1/4 of 1 inch (25.4mm), which is "6.35mm." However, the outer diameter reference dimension for the pipe thread "G1/4-19" (old standard: PF1/4-19) is 13.157mm, which does not match at all. How should I understand this? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations. 【Contents】 ■Inquiry In an old drawing, the part for the internal thread is labeled "TM10X2." I understand that it is a "30° trapezoidal thread," but I was told by the retailer that the TM tap is no longer available on the market, and that the tap for the 30° trapezoidal thread would be Tr 10X2. Is it okay to process with this tap? Also, what diameter should the pilot hole be? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to the inquiries received from customers. This document also includes detailed advice. 【Contents】 ■Inquiry Using a pipe taper tap: I am tapping with PT1/2-14 on a radial drill, but I am not sure how far I need to insert the tap to achieve a tapered thread that meets the standards. What are the reference dimensions for this? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document also includes detailed advice. 【Contents】 ■Inquiry We are processing PT 1/4-19 manually, but unlike machine processing, we cannot set the tap insertion length using a scale. Is there an easy way for anyone to understand how far the tap should be inserted into the workpiece? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry There are various symbols for pipe threads, such as R, Rc, Rp, G, PT, PS, and PF, but is there any rule regarding the combination of "female threads" and "male threads"? It is quite confusing and very troublesome. *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document also includes a comparison table of the effective diameter tolerance ranges for pipe threads. 【Contents】 ■Inquiry There are various types of "pipe threads" such as G, PF, R, Rc, and PT, but is there any material that clearly shows their relationships at a glance? I hear explanations that they are the same standard with just different symbols, but I don't understand. Additionally, I cannot grasp the differences between the current JIS standards and the old JIS standards. *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document also includes detailed explanations. [Contents] ■Inquiry Symbols such as "L" and "ℓ" are listed in catalogs and tap drawings; could you please explain their meanings? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received an order for the processing of the "external thread" of a camera tripod mounting part. The dimensions are "1/4-20". Previously, when we processed the "internal thread" of the camera tripod mounting part, we used a tap for tripod mounting screws. Is a special die also necessary for processing the external thread? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I have taken on a job to process male threads of "NPT3/8" for exports to the United States. I have a "PT3/8" tap that I always use on hand; can it be used as a substitute? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry A customer has requested to perform tapping for "M8 reverse thread." Do you have a tap for reverse threads? I don't quite understand what kind of tap it is, so please let me know. *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry In the tap catalog, it states "M 8 X 1.25" in the "call" section. Could you please briefly explain what this refers to? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry In the tap catalog, it states "1/4-20UNC" in the "Call" section, but could you please briefly explain what "1/4" and "20" refer to? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We plan to process the pipe taper male thread "PT 3/8-19" using YAMAWA's solid die for pipe taper threads "D PT." How far should the die be inserted to achieve good male thread dimensions? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry What kind of cutting tool is a center hole drill used for? In processing sites, it is used for positioning and chamfering, but what is its original intended use? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry We are performing roll tapping on SS400 material with M6X1. We understand that the inner diameter of the processed blind hole varies in its bulging depending on the material and processing shape, so the pilot hole diameter is just a guideline. Please let us know if there is a good method to find the appropriate pilot hole diameter. *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received an order for a work drawing that specifies a screw labeled "CTG22-14." What kind of screw is this? Also, please tell me about the screw standards. *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received a request for a quote for the screw machining indicated as "CTC25-16" on the drawing. What kind of screw is this, and what are the specifications? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to the inquiries received from our customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We have been performing tapping on a small amount of cast iron (FC250) material, but we have received a continuous order for a large volume of tapping work. The screw size is an M8×1.25 through hole of 15mm. We have been processing with the HT P3 M8X1.25 medium tap that we have used for cast iron in the past, but the through gauge (GP-6H) is becoming unusable quickly, and we are struggling with the frequent need to replace taps. Is there a recommended good tap? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We are processing pipe taper taps Rc (PT) on a machining center, but we are having trouble with the internal threads being stripped. Is there any way to improve this? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We are planning to undertake work on aircraft components, specifically tapping UNJ threads of 1/4-28UNJF and 5/16-24UNJF. I understand that by using taps for Unified threads, 1/4-28UNF and 5/16-24UNF, which can process 3B class threads, and adjusting the pilot hole diameter to the specified inner diameter dimensions, we can process UNJF threads. However, what is the recommended grade for taps that can process 3B class threads? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We are processing a tapered pipe thread Rc (PT) 1/4-19 with a screw length of 8.7mm using a carbide helical cutter: 080153X19R. At that time, we received advice that it would be better to make the pilot hole tapered rather than straight. How should we process the pilot hole to be tapered? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to the inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We are performing "tapping" for metric screws and unified screws. As a method to inspect the internal threads, we insert commercially available bolts to check the degree of "play" on the processing site and make a judgment on their quality. This time, we received a request from a customer to be cautious, as there are some screws with significant play and some that are too tight. We understand that it would be good to inspect with the screw gauges "GP-6H" and "NP-6H," but it is difficult to prepare all types of screw gauges due to cost constraints. Is there a good solution? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I am using a pipe taper tap SP-PT on a machining center, but occasionally the threads are getting damaged, which is a problem. Is there any way to improve this? *For more details, please refer to the PDF document linked below.

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.

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.

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.

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.

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.

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.

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.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry In the machining drawing, it says "screw" with terms like 1/4UNC and 1/4UFC. What do they mean? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We have received an order for camera parts. In the drawings, there is a specification for "tripod mounting screw 1/4-20" indicating a female thread. Is this a special female thread? I don't understand well, so please let me know. *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries from customers. This document includes detailed explanations as well. [Contents] ■Inquiry "I found a hand tap marked 'TRI 1/4-20'. What is this tap used for? Is it okay to substitute it with a Unified thread tap '1/4-20UNC'?" *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I learned that YAMAWA manufactures medical surgical instruments at web and medical exhibitions. Is it the same company as "YAMAWA Manufacturing Co., Ltd." which produces industrial taps, dies, and center hole drills? Also, what kind of medical surgical instruments do you manufacture? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received a request from hospital personnel for the delivery of medical drills and taps. However, we have never manufactured medical drills or taps, so we were in trouble. Can you supply them for manufacturing? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We have received an order for a "special drill" to be used in surgery from an orthopedic hospital. We are considering domestic procurement and learned through the web that "YAMAWA" manufactures medical surgical instruments. How should we place an order? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I purchased a water faucet from a home center and plan to install it on the distribution pipe. The thread specification is noted as "PJ 1/2". What kind of thread specification is this? Additionally, what type of female thread can this faucet be installed on? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I was given a processing drawing with the thread symbol "Pg13.5." This is the first time I've seen this thread symbol; what kind of thread is it? Also, can I obtain a tap for it? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry I would like to perform the internal thread processing indicated as "MJ8×1" on the machining drawing using a tap, but what is "MJ thread"? Is it not possible to process it with the tap for "M8×1" which is normally used for "metric threads"? *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. [Contents] ■Inquiry There is a notation "S0.8×0.2" for a screw on the drawing. What is the standard for this screw? *For more details, please refer to the PDF document linked below.

YAMAWA will respond to inquiries received from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry We received a request for a quote for a part that has a threaded processing indicated as "20.32W36" on the drawing. I heard from the client that this is a part for "optical equipment," but what kind of standard is this thread? I am unsure what tools to use for processing and am in trouble. *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries from customers. This document includes detailed explanations as well. 【Contents】 ■Inquiry "We are going to manufacture two types of bicycle parts with screws '5V2' and 'CTV5-36'. What is the difference between these similar markings? Also, are there taps available for processing?" *For more details, please refer to the PDF document at the link below.

YAMAWA will respond to inquiries received from customers. This document also includes detailed explanations. 【Contents】 ■Inquiry We have received a request for a manufacturing estimate for a part with a male thread called "5V1." However, I do not understand what kind of thread "5V1" is. Do you have taps that can process it? *For more details, please refer to the PDF document at the link below.

This document introduces the differences between the front and back of the die, as well as the names and roles of each part. It includes the reasons why Solid Die D cannot be used from the back side and methods to distinguish between the front and back sides. Additionally, it introduces a die attachment that can be easily mounted on Solid Die D, suitable for stable processing and high-quality male thread machining. [Contents] ■ Consultation ■ Response ■ Explanation *For more details, please refer to the PDF document linked below.