Differences between I.D (Inner Diameter), O.D (outer diameter) and how it affects carb cap fit and function.
As a consumer, it is sometimes difficult to recognize the lack of standard procedure or governing mechanisms in today’s highly competitive quartz accessory industry. Most -- if not all of these accessories are handmade, which makes it entirely more difficult to regulate on a productive and quality-controlled scale.
Each manufacturer uses different equipment, sources of material, and people, which in turn ultimately leads to various levels of standards & tolerances when it comes to offering a quality product. Here’s an excellent example of how confusing this might be to the average consumer:
Company A might feel that 3.2mm is the optimal wall thickness for their quartz banger product. Meanwhile, Company B decides that 2.5mm is the better option. Even though both companies advertise for a “30mm quartz banger”, a carb cap will fit differently on each banger.
However, their slight contrast in wall thickness will affect more than just the heat retention or aesthetics. Especially as a company that makes caps for these products, it is something very important to understand.
To be more precise, let’s consider the Highly Educated Gavel 3. The Gavel is advertised as a 25mm banger in diameter with a wall thickness of 2.5mm. Taking into account of the wall thickness on BOTH sides of the overall diameter, the diameter from inside-wall to inside-wall will be significantly less: 20mm. This needs to be taken into consideration equally by the designers of the caps as well as the person looking for the right cap to fit their specific banger.
Equation: OD (overall/outer diameter) - Wall Thickness *2 = ID (inner diameter, from wall to wall) 25mm - (2.5mm *2) = 20mm Conclusively, the smallest diameter cap that will fit the HE Gavel 3will need to be slightly above the ID, at approximately 21mm.
Although this discrepancy between quartz manufacturers was not necessarily intended to be misleading, that is often the frustrating reality of it for cap producers and enthusiasts alike. We understand that it can get confusing, and this is why we take it so seriously to educate our customers and any curious person diving into such an obscure and diverse market.