Fastener Calc 2.2.1

Bossard's suite of productivity tools offers a comprehensive set of calculators and converters tailored for engineers, technicians, designers, and students engaged in the development and assembly of bolted joints.

Converters address a variety of unit conversions across different measurement categories:

• Length Converter: Facilitates conversion among over 68 units, including inch, centimetre, metre, mile, foot, and yard.
• Torque Converter: Converts various torque units such as newton metre, dyne metre, kilogram force metre, and ounce-force inch.
• Pressure Converter: Transforms pressure units like bar, millibar, psi, and pascal.
• Force Converter: Converts force measurements including newton, dyne, kilogram-force, and ounce-force.
• Metric-Imperial Fasteners Converter: Assists in converting fastener forces between metric and inch measurements, providing optimal suggestions and highlighting differences clearly.
• Hardness Converter: Converts hardness values to tensile strength for unalloyed and low-alloy steels as well as cast iron.

The geometrical calculators support dimensioning and implementation tasks within joining technology:

• Drill Hole Size for Tapped Threads: Determines the appropriate tap drill size for common screw types.
• Pilot Hole Design for Tapping Screws: Calculates core hole diameters according to DIN 7975:1989 standards.
• Pilot Hole Design for ecosyn®-Plast: Derives boss geometries suitable for various thermoplastics used in ecosyn®-plast applications.
• Tolerances for Shafts and Holes: Provides calculations based on ISO 286-2:2010 to determine standard tolerance classes and limit deviations.

The mechanical calculators focus on dimensioning and design considerations in joining technology:

• Estimate Bolt Size and Property Class: Recommends appropriate bolt diameter and strength class tailored to specific applications, following VDI 2230:2014 guidelines.
• Disc Spring Calculator: Computes disc spring parameters based on DIN 2093 specifications.
• Cost Savings Calculator: Assesses potential cost reductions related to fastener activities by analyzing associated activity costs.
• Thread Engagement Length Calculator: Calculates the minimum required thread engagement length for blind hole and through hole applications in accordance with VDI 2230:2014.
• Tightening Torque and Preload with Nut Factor: Computes torque and preload values considering nut factor for inch screws using the formula T = D*K*F.
• Torque and Preload with Nut Factor and Tool Accuracy - Imperial System: Incorporates tool precision variations into the calculation for inch screws to improve accuracy.
• Torque and Preload with Nut Factor and Tool Accuracy - Metric System: Similar calculations adapted for metric screws, considering tool accuracy and preload scatter based on T = D*K*Fmean.
• Torque and Preload with Friction Scatter: Evaluates tightening parameters accounting for friction variations in hex head and socket head screws following VDI 2230:2014 standards.
• Torque and Preload for Customized Geometry and Material: Provides tailored calculations for various screw types with options for custom head shapes, hole chamfers, reduced shanks, or materials, based on VDI 2230:2014 guidelines.
• Torque and Preload Calculator: General tool to determine tightening torque, preload, and surface pressure for hex head and socket head screws compliant with VDI 2230:2014.