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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...

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...

Confirming cuts using the arrow-down key 5.2.7   oval method   After entering V and H cut values for a row in the Oval Calculator, Spectre Cloud provides a quick keyboard shortcut to confirm the entry and move to the next field or row — the arrow-down key. ...

Worked example: full V/H oval from start to finish 5.2.8   TIP   example   This page walks through a complete, real-world oval calculation from first opening the Oval Calculator to the finished values recorded on a spec sheet. It brings together all the con...

Setting up: Oval Cut Direction = H in Settings 5.3.1   CALC   oval method   Before using the Oval Calculator in horizontal-cut mode, Spectre Cloud needs to know that your shop measures and records ovals with the horizontal dimension listed first. The Oval C...

When to use H-only mode and which drill presses it suits 5.3.2   oval method   H-only mode in Spectre Cloud's Oval Calculator is designed for drilling workflows where the oval cut is made exclusively on the horizontal axis — side to side across the hole — w...

Entering H-only cut values and reading output 5.3.3   oval method   Once your Oval Cut Direction is set to H and you have confirmed that your drill press setup produces a pure horizontal cut (see 5.3.2), entering the cut value in Spectre Cloud is straightfo...

Worked example: H-only oval 5.3.4   TIP   example   This page walks through a complete H-only oval calculation from opening the Oval Calculator to finished values ready for the spec sheet. It covers a realistic scenario where a pure horizontal cut is the ri...

Setting up: Oval Cut Direction = V in Settings 5.4.1   CALC   oval method   The third Oval Cut Direction option in Spectre Cloud is V — a pure vertical-only configuration that records and displays ovals with the vertical dimension only, without a paired hor...

When to use V-only mode 5.4.2   oval method   V-only mode is the right configuration when your drilling workflow consistently produces a stretch on the vertical axis alone — toe to heel — with no measurable horizontal component, and when your documentation ...

Entering V-only cut values and reading output 5.4.3   oval method   With Oval Cut Direction set to V and your press confirmed to produce a pure vertical stretch, entering a V-only cut in the Oval Calculator is the most streamlined input workflow Spectre Clo...

Setting up: Oval Cut Direction = NONE in Settings 5.5.1   oval method   Before using the Oval Calculator, Spectre Cloud needs to know how your drill press handles oval cuts. The Oval Cut Direction setting tells the app which axis your press moves along when...