ENGINEERING CALCULATORS
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Engineering calculators (Beta)
Move the footprint over the roller grid to inspect contact counts, then calculate a per-roller rating from a separately entered effective sharing count and multiplier.
Click the grid to add ordered vertices. Edit coordinates in mm; separate holes with a blank line. The last vertex closes to the first automatically.
Choose units and enter numbers. Full-width digits and fractions such as 1/8 or 1 3/8 are accepted. Changing a unit converts the entered value.
Reference calculation only. Results do not certify suitability for an actual design or its safety.
Inputs: select a blue symbol to edit Results: red-orange values and lines
3D shows an illustrative extrusion. Its display length does not enter the section calculations. Edit dimensions in 2D.
nmin=floor(L/p); nmax=floor(L/p)+1 (closed endpoints); Creq=kmg/ne; pmax=L/nt. Geometric contacts do not establish actual load sharing.
Displayed values are rounded. Diagrams illustrate the calculation conditions. Initial material and fluid properties are examples; replace them with values for the actual material, temperature and conditions.
ReferenceEquations assume particular loads, supports and deformation ranges. Check inputs, units and the applicability of each equation. Diagrams explain conditions; they are not manufacturing drawings or proof of safety.
Material values are typical values or reference ranges, not certified product properties or ready-to-use design allowables. They vary with standards, product form, dimensions, temper and temperature. Check the specifications and inspection certificates for the actual product.
Displayed safety factors and checks apply only to the supplied inputs and calculation model. They do not automatically establish the safety of a complete design, including code compliance, service life, fatigue or joints. For actual design, manufacture and use, separately verify applicable regulations and standards, product specifications, and the necessary tests and engineering review.
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搬送物の位置を変えながら接触するローラー本数を確認し、別に指定した実効分担本数と倍率から1本の必要許容荷重を求めます。
nmin=floor(L/p); nmax=floor(L/p)+1 (closed endpoints); Creq=kmg/ne; pmax=L/nt. Geometric contacts do not establish actual load sharing.
同じ高さ・等ピッチの直線ローラーに、連続した平らな長さLの底面が載る幾何モデルです。L/p≤40、0≤q≤100%、0<D<p、neは整数で1以上・nmin以下、nt≥2、k≥1とします。端点ぴったりの接触も幾何として数えますが、端だけの接触が実際に荷重を分担するとは限りません。1本の荷重は接触本数で自動的に割らず、底面剛性、重心、ローラー高さ差、衝撃に合わせた実効本数neを別に入力します。nt=3とne=2は指定例で、メーカー共通の基準ではありません。kとneで同じ偏荷重を二重計上しないでください。nminが2未満では安定した支持をこのモデルで確認できません。荷物の重心位置、たわみや不連続底面、乗移り・片持ち・落下、フレームや軸受の強度、動的反力は別の確認です。
Move the footprint over the roller grid to inspect contact counts, then calculate a per-roller rating from a separately entered effective sharing count and multiplier.
nmin=floor(L/p); nmax=floor(L/p)+1 (closed endpoints); Creq=kmg/ne; pmax=L/nt. Geometric contacts do not establish actual load sharing.
Geometric model of equal-height, equally spaced straight rollers beneath a continuous flat footprint. Require L/p≤40, 0≤q≤100%, 0<D<p, integer 1≤ne≤nmin, nt≥2 and k≥1. Endpoint contacts are counted geometrically but may carry no actual load. Do not divide load automatically by contact count; establish effective sharing ne from footprint stiffness, CG, roller height errors and impact. nt=3 and ne=2 are examples, not universal manufacturer rules. Avoid duplicate allowance through k and ne. With nmin<2, this model cannot establish stable support. Separately check CG, compliance/discontinuous bottoms, transfers/overhang/drop, frame/bearing strength and dynamic reactions.
