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What is an oval thumb hole and why is it used? 5.1.1   KEY   concept   Most bowling balls are drilled with round holes — circular in cross-section, sized to fit the bowler's thumb or fingers at the point of insertion. For many bowlers, a well-fitted round h...

Oval terminology: Starting Bit, Oval Width, Oval Degrees, Taper 5.1.2   glossary TODO — write this page. ```html Before working with Spectre Cloud's oval calculator, it helps to have a clear understanding of the four key terms used throughout the oval thum...

Vertical cut (V) vs. Horizontal cut (H) — what they mean physically 5.1.3   concept   When making oval cuts at the drill press, the operator physically moves the ball relative to the drill bit along one of two axes to remove material and elongate the pilot ...

How oval degree affects pitch inside the oval 5.1.4   concept   When a thumb hole is round, vertical pitch and lateral pitch act independently — each one influences the thumb along its own axis without affecting the other. When the hole is oval, this indepe...

2.1.2   setting When you change the display language in Spectre Cloud, more than just menu text changes. Button labels, field names, span type abbreviations, measurement unit labels, and instructional text throughout the interface all update to reflect the se...

2.2.1   setting The Bowler Hand default setting controls whether new bowler profiles and new spec sheets are pre-filled as right-handed or left-handed. It is a time-saving convenience — nothing more. You can always change the handedness on any individual bowl...

2.2.2   default The Grip Type setting controls which grip style is pre-selected when you create a new spec sheet. Choosing the right default for your shop saves time — your drillers won't need to manually switch the grip type for every new client. 🤚 What Is ...

2.2.3   display The Measurement Display setting controls whether span, oval, bridge, and depth measurements appear throughout Spectre Cloud in decimal format (e.g. 4.25") or fractional format (e.g. 4 ¼"). This is a display-only preference — the underlying val...

2.2.4   display The Oval Degree Increments setting controls the step size of the degree selector in the Oval Calculator. You can choose between 1° increments for fine-grained precision, or 5° increments for faster, broader selections. The right choice depends...

2.2.5   default The Insert Installation default controls which installation method is pre-selected when creating a new spec sheet — either STD (standard glued) or VACU Grip (vacuum-style). Setting the correct default for your shop means your drillers spend le...

2.2.6   default When fitting a bowler with VACU Grip inserts, Spectre Cloud calculates the two hole sizes required for the two-tier drill based on the insert's outer diameter (O.D.). The lower hole matches the insert O.D. so the insert seats and glues at the ...

2.1.1   setting Spectre Cloud is available in nine display languages. Changing your display language updates all menus, labels, and interface text across the app — your bowler data and spec sheet content are not affected. 🌍 Available Languages Languag...

2.3.2   oval When drilling an oval hole, Spectre Cloud needs a reference point from which to calculate the initial pitch of that hole. Because an oval opening has width — unlike a round hole, which has a single center point — there are two valid ways to defin...

2.3.6   oval The Flip V/H on oval cuts setting controls the display order of the vertical and horizontal values in the oval cut cards shown by the Spectre Cloud oval calculator. This setting should match the order your drill press digital readout (DRO) displa...

Setting up: Oval Cut Direction = V/H in Settings 5.2.1   CALC   oval method   Before using the Oval Calculator, Spectre Cloud lets you choose how oval measurements are displayed and recorded throughout the app. The Oval Cut Direction setting controls whethe...

Entering Starting Bit and Oval Width — Bit Size mode 5.2.2   oval method   When using the Oval Calculator in Bit Size mode, you enter two values Spectre Cloud uses to calculate the resulting oval: the starting drill bit size (the diameter of the round bit u...

Entering Starting Bit and Oval Width — Decimal mode 5.2.3   oval method   When using the Oval Calculator in Decimal mode, you enter the same two core values as Bit Size mode — the starting drill bit diameter and the oval width — but expressed as decimal num...

Reading the DIFF (decimal difference) auto-calculation 5.2.4   oval method   Whenever you enter oval measurements in the Oval Calculator, Spectre Cloud automatically computes the DIFF — the decimal difference between the two oval dimensions. You do not need...

Adding oval cut rows using the + button 5.2.5   oval method   The Oval Calculator in Spectre Cloud is not limited to a single hole calculation at a time. Using the + button, you can add multiple oval cut rows within the same calculator session — one row per...

Entering V and H cut values (positive and negative) 5.2.6   oval method   When recording oval cuts in Spectre Cloud, each hole's oval is described by two directional values — a V (vertical) cut and an H (horizontal) cut. These values can be entered as posit...