A Shoulder Bolt, also known as a shoulder screw or stripper bolt, is a specialized mechanical fastener designed to provide a fixed shoulder that can function as a shaft, pivot, guide, mounting pin, or sliding surface. Unlike conventional bolts, the shoulder section has a larger diameter than the threaded portion and provides a precise surface for components that need to rotate, slide, or move.
Shoulder Bolts consist of three primary sections: the head, shoulder, and threaded portion. The shoulder diameter and length determine the working area available for mounted components such as bearings, bushings, pulleys, gears, springs, and other mechanical parts.
Adore Industries manufactures and supplies Shoulder Bolts in different dimensions, materials, thread configurations, and surface finishes according to customer requirements and applicable standards.
Key Features
- Precision shoulder between the head and threaded section
- Can function as a shaft, pivot, guide, or mounting pin
- Suitable for rotating and sliding components
- Available with different shoulder diameters and lengths
- Suitable for mechanical and industrial assemblies
- Used with bearings, bushings, gears, pulleys, and springs
- Available in metric and imperial dimensions
- Multiple surface treatments and coatings available
- Customized dimensions can be manufactured
Main Components of a Shoulder Bolt
A Shoulder Bolt generally consists of three main sections:
Head
The head provides the tool-engagement area required for installation and tightening.
Shoulder
The shoulder is the larger-diameter section located directly below the head. It provides the working surface for mounted components and is specified by its diameter and length.
Thread
The threaded section has a smaller major diameter than the shoulder and is used to secure the bolt into the mating component.
Applications
Shoulder Bolts are widely used in mechanical and industrial applications, including:
- Punch and die equipment
- Plastic injection molding systems
- Aerospace equipment
- Machinery assemblies
- Bearings and bushings
- Pulleys, gears, and sprockets
- Sliding mechanisms
- Pivot assemblies
- Hinge points
- Mounting applications
- Spring-loaded mechanisms
- Consumer and industrial products
Rotating & Sliding Applications
The shoulder section can act as a controlled shaft or bearing surface for components that require movement. Pulleys, gears, sprockets, and similar components can be mounted over the shoulder to allow rotational movement.
Shoulder Bolts can also be used as guides for sliding components or as mounting points for springs and other mechanically moving parts.
Shoulder Bolt Design
The shoulder diameter, shoulder length, thread diameter, and overall length can be selected according to the required application. Proper dimensional control is important where the shoulder functions as a bearing, pivot, guide, or sliding surface.
Adore Industries can manufacture customized Shoulder Bolts according to customer drawings and specific dimensional requirements.
Standards
Shoulder Bolts can be manufactured or supplied according to applicable standards, including:
- ASME
- BS
- ISO
- DIN
- SAE
- Other international standards
Customized specifications can also be accommodated according to project requirements.
Materials & Surface Finishes
Shoulder Bolts can be supplied with suitable base materials and surface finishes according to the application. Surface treatments can improve corrosion resistance, wear characteristics, and overall service suitability.
Available finishes and treatments include:
- Black Oxide
- Zinc Plated
- Galvanized
- PTFE Coated
- Hot-Dip Galvanized
- Aluminum Zinc Flake Coated
- Zinc & Yellow/Bichromate
- Zinc Electroplating
- Zinc Nickel
- PTFE (Xylan®)
- Ceramic Coating
- Nickel Plating
- Mechanical Galvanizing
- Phosphate
- Molykote
- Electroless Nickel Plating
- Epoxy Coatings
- Zinc-Aluminum Flake Coating
Available Sizes & Threads
Shoulder Bolts are available in metric and imperial sizes according to customer requirements.
Shoulder diameter, shoulder length, thread size, thread length, head dimensions, and overall length can be customized to suit specific mechanical assemblies.
Hot-Dip Galvanizing
For high-tensile fasteners requiring hot-dip galvanizing, suitable processing and heat-treatment practices can be followed to help minimize the risk of hydrogen embrittlement.
Zinc electroplating can also be supplied in different finishes, including blue, black, and yellow, according to customer requirements.
Why Choose Adore Industries for Shoulder Bolts?
Adore Industries manufactures and supplies Shoulder Bolts for precision mechanical, industrial, tooling, molding, and equipment applications. We provide customized dimensions, thread configurations, materials, surface treatments, and coatings to meet specific project requirements.
Contact Adore Industries for Shoulder Bolts manufactured according to your required dimensions, materials, standards, and surface finish.