Lagging Maven · Engineering and installation
Wear and cable loading.
Rubber shear cycles.
Pulley-specific installation.
See how your belt and pulley work together, compare engineering choices, and turn the selected lagging into a clear installation plan.
Explore the three purposesUS$5 / monthMac · iPhone · iPad · Apple Vision Pro
App Store release in preparation.
Three purposes. One shared asset.
Compare lagging profiles and see how pressure, slip and cable loading change across the belt.
Compare wear and loading → 02 · EACH LOADING CYCLEExamine pressure, shear and rubber deformation to understand the repeated loading behind fatigue.
Examine the shear cycle → 03 · THE SPECIFIC PULLEYTurn pulley dimensions and selected materials into a layout, estimate and installation package.
Prepare the installation →01 · Wear & cable loading
The transition shapes how tension is distributed across the belt. That distribution affects pressure, shear and slip at the pulley. Compare unworn and specified worn profiles to see how a change in the lagging surface changes contact and cable loading.
Compare local shear demand with the friction capacity set by pressure and the selected friction model.
Inspect pressure, shear traction, slip and sliding work across the pulley. Bring transition-derived loading into the contact study to explore the effect of unequal belt tension.
View mapped cable forces alongside the lagging profile. Keep the belt and operating duty consistent while comparing the effect of different wear shapes.
Computed engineering example
Follow pressure, cable loading, slip and sliding work across the same belt width. This illustrative driven pulley has 600/300 kN entry/exit tensions and a transition-derived inlet.
Read the fields together. In this case, the pressure minima lie about 514 mm either side of center. The outer sampled strips carry the greatest sliding work: about 215 J/m² per passage, compared with 123 J/m² at the center. Pressure sets friction capacity; local shear demand and relative sliding determine how that capacity is used.
1,000 mm steel diameter; 1,800 mm belt width; uniform 12 mm rubber lagging; 6 mm contacting belt cover; 180° wrap; 600/300 kN entry/exit tension; 5 m transition; 35° trough; 100 mm pulley tangent elevation. Rubber shear modulus is 1 MPa for both layers and the assumed friction coefficient is 0.6.
The contact field uses 21 width strips and 240 arc intervals. The upper two plots show the same 90° station. Cable forces are mapped by integrating belt tension over each cable’s tributary width. The lower two plots sum slip and frictional work over the full passage. For this baseline, sliding first appears near the outer width samples at 166.5° of wrap.
The starting lagging is unworn throughout. These fields describe the contact demand from which a material-specific wear law can calculate a wear increment. Each changed profile then requires a new mechanical solution.
Download the inputs and calculated fields02 · Rubber shear & fatigue
Examine the pressure, shear and elastic deformation carried by the lagging and belt cover. Relate those contact results to the repeated loading that matters for rubber fatigue.
Each patch enters contact, carries load, leaves the belt and returns with the shell.
Each patch passes through the conveyor before returning to this pulley.
Read normal pressure, signed shear traction, elastic deformation and interface slip together. See how the lagging and contacting belt cover carry the applied demand.
Compare layer thickness, shear stiffness, friction and operating tension. Connect material choices to calculated contact behavior and rubber deformation.
The chart maps the steady center-strip contact solution onto one lagging revolution. It uses homogeneous elastic layers with immediate unloading outside contact. Both layers have a shear modulus of 1 MPa, so their shear-strain traces coincide. The belt-cover trace represents the rubber at each contact location; a particular belt patch has its own full-circuit history.
These plots describe elastic mechanical demand. Fatigue assessment connects a material’s loading history with compound-specific test data and a defined failure criterion.
03 · Pulley-specific installation
Use the pulley dimensions, selected lagging, attachment system and manufacturer procedure to prepare a job-specific layout, material estimate and inspection record. Give the installation team a clear plan and a shared reference.
Record shell and finished dimensions, strip or sheet layout, seam positions and groove orientation. Secure the pulley, establish a line parallel to its shaft, and align the first strip. Check shaft level when using a level to establish that line.
Keep surface preparation, backing treatment, chemical identities, coat and cure requirements, quantities and labor with the job. Record finished dimensions, bond evidence, inspection and the responsible release decision.
A numbered layout, illustrated instructions and an animated placement sequence give the team a common reference. See the schematic placement sequence in this example export.
20-second silent schematic preview. Stage text is available in the illustrated sequence. Follow the procedure for the selected lagging and adhesive system.
Connected through the same project
Keep pulley dimensions, belt data, material choices, calculations and the installation plan together. Save your project, compare engineering inputs and share the layouts and instructions your team needs.
One monthly subscription
Contact and wear-profile studies, cable-loading tools, surface design, installation planning, costing and exports across your supported Apple devices.
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Lagging Maven Monthly
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App Store release in preparation
Questions before you start?Compare specified wear profiles, transition-derived inlet loading, operating tensions, friction and rubber-layer properties. Inspect the resulting pressure, shear, slip and mapped cable forces to understand how those choices affect the contact.
Export numbered SVG layouts, illustrated HTML sequences, schematic MP4 placement animations and installer information. Keep quantities, costs, supplier references and inspection evidence with the job.
Plan cylindrical shells with full-wrap sheets or full-face axial strips, plus materials for autoclave jobs. Explore groove patterns and ceramic coverage in the surface studio.
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Use the same Apple Account and Restore Purchases on Mac, iPhone, iPad or Apple Vision Pro. Transfer project files between devices through the file locations you choose.
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A changing wear profile, a demanding shear cycle, or an installation to plan. Start with the belt, pulley, material and operating conditions.
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