Conical Surface Locating Pull Stud

1. Product Introduction

This high-precision Conical Surface Locating Pull Stud (for CNC Fixture Quick Change) is a custom-engineered component designed for use with matching conical locating seats, serving as a core part of quick-change workholding systems. Manufactured from high-strength alloy steel or 420 stainless steel, it undergoes precision turning, heat treatment, and grinding to achieve tight tolerances, including a critical conical surface with ±0.05 mm dimensional control and a concentricity of ≤Φ0.05 mm. The dual-taper design enables automatic centering, eliminating radial play and ensuring a repeat positioning accuracy of ±0.005 mm when paired with the locating seat. It is installed on workpieces or pallets, enabling fast, repeatable clamping for CNC machining centers and automated production lines, significantly reducing setup time while maintaining machining consistency.

2. Product Parameter (Specification)

Production Name	Conical Surface Locating Pull Stud
Material Capabilities	Customized
Brand	LIONSE
Surface Treatment	Customized
Origin	Qingdao, China
Diameter	Customized

3.Product Details

Challenges in the processing of the Conical Surface Locating Pull Stud:

1. The high requirements for core dimensions and geometric tolerances (the most direct difficulty)

①The contour and angle accuracy of the double conical surface

• Even if the angle error of the conical surface is as small as ±10′, when it is assembled, "line contact" instead of "surface contact" will occur, resulting in inaccurate positioning and uneven force distribution.
• The roundness and cylindricity of the conical surface must be controlled within 0.003 - 0.005mm; otherwise, there will be a gap when it is assembled with the positioning seat, directly lowering the repeatability positioning accuracy.

②Control of coaxiality

• The coaxiality deviation can cause the threaded pin to be installed on the workpiece, resulting in the conical surface being "crooked" and uneven force distribution when it is in contact with the positioning seat. This not only makes the positioning inaccurate but also accelerates the wear of the conical surface.
• During the processing, it is necessary to complete the processing of the thread, outer circle, and conical surface in one setup, or use high-precision tooling for a secondary setup. The requirements for the stability of the equipment and process are extremely high.

2.The difficulties of the processing technology (the entire process from turning to grinding)

①The control of deformation during turning and heat treatment for these screws is typically done with 420 stainless steel or 40Cr alloy steel. The main challenges in processing are as follows:

• Turning stage: Stainless steel materials tend to stick to the tool, and tend to form chip lumps. During conical surface turning, vibration marks and poor surface finish are prone to occur, requiring special tools and stable cutting parameters.
• Heat treatment deformation: After quenching, the conical surface, threads, and outer circle of the part will have slight deformations. If the deformation exceeds 0.01mm, it is difficult to correct through subsequent grinding. Therefore, deformation allowance must be reserved in advance and the heat treatment process must be controlled.

②The conical surface grinding process (a crucial step in determining the final accuracy) involves fine machining of the conical surface. After this, the surface needs to be refined through grinding to correct errors and enhance smoothness. This is the most time-consuming and demanding part:

• During the grinding process, the angle, roundness, and smoothness of the conical surface must all be maintained. The control requirements for the grinding equipment, abrasive, rotational speed, and pressure are extremely high.
• Even the slightest mistake can lead to problems such as "flared openings" or "unclean conical surfaces", resulting in poor fit during assembly and a decrease in positioning accuracy.

LIONSE has established a well-deserved reputation in the CNC machining industry for quality, reliability, cost-effectiveness and timely delivery. To meet your expectations for your projects, our team of mechanics and engineers will work closely together throughout all stages of product development, from prototype to production. We recognize that each project and its application are unique, so we offer each customer a distinctive yet practical solution, including precision machining services and custom surface treatments. Contact us today and let us start creating your parts.

Q1: what products is your company producing?

For over 15 years, LIONSE is a worldwide supplier in the distribution of titanium products, metal working and bearings. The industries we serve is including surgical implants & tools, automotive parts, chemical devices, power generation, mine equipments, aircraft, pumps etc. LIONSE is your reliable supplier.

Q2:How does your company control the products' quality?

Well, as we all know that quality comes first during the business with our customers we always persist in the "Quality is the life of enterprise. we are using the first confirmed cases, production inspection, and packaging seized the entire combination to control product quality strictly.

Q3:How to conduct high-precision detection of conical surface profiles?

The angle, roundness and coaxiality of the conical surface cannot be detected using ordinary calipers or micrometers. Instead, a three-coordinate measuring instrument, a roundness gauge and a conicality detector must be used.

Q4:What is Conical Surface Locating Pull Stud?

A Conical Surface Locating Pull Stud is a high-precision mechanical component used in CNC machining, fixture systems, and automated production lines. It combines the functions of positioning, centering, and clamping by using a tapered (conical) surface to achieve accurate, repeatable mating with a matching locating seat or chuck.