How To Measure Fitter For Glass Shade
The start thing you must consider when replacing a drinking glass lampshade is the proper "fitter" size of the shade holder on your lamp or fixture. The shade holder is the function (usually metal) that holds the shade to the lamp or fixture (encounter "before" picture beneath).
The fitter is the portion of the shade holder through which the drinking glass lampshade actually passes and makes concrete contact with the lamp. Shade holders come in different fitter sizes then exercise drinking glass lampshades. The idea, logically, is to match the aforementioned fitter size for both the shade holder and shade.
Sounds easy you lot say. It is, but before you tin start looking for a shade with the right fitter size you should first determine the type of shade holder that your lamp or fixture has.
Determine Your blazon of Holder: Fixture-type or Directly
Basically, there are two types of holders for glass shades One type of holder is a fixture-type holder which is frequently seen on hanging fixtures, pan lights, etc. and uses small set screws to hold the lampshade in place (run into fig. 1). The setscrews are necessary because sometimes, every bit in the case of early on electric fixtures, the holders actually "face" downwards. If the screws are not properly tightened against the the shade's fitter, the shade may literally fall to the floor.
Shades designed for fixture-type holders almost always accept a "lip" type fitter (see fig. two).
A shade's fitter is the portion of the shade that is really inserted into, and contacts, the shade holder. The shape of the lip fitter helps the setscrews lock the shade down and prevents the shade from falling from the holder, even when the holder "faces" downwards. Gas shades, fixture shades, and pendant-blazon shades almost always take lip fitters.
Another type of shade holder which is commonly found is a straight-type holder. It requires no setscrews because this type of holder is always in an upright position so that, typically, the bottom border (or fitter) of the shade rests inside of the shade holder's opening (see fig. 3). Tripod shade holders or "spiders" likewise do not require setscrews and function in the aforementioned manner every bit the straight-blazon holder.
Shades placed in direct-type shade holders almost always accept "straight" fitters, meaning the edges that contact the holder are direct (encounter fig. 4). I may place a "lip" fitter shade in a straight-type shade holder simply often the fit and/or awarding will exist wrong or mismatched creating a literal but non completely uncommon, shade age fake pas.
Determine the Fitter Size of Your Shade Holder
Afterward you accept determined the type of shade holder that your lamp or fixture has, you need to measure the fitter size of the shade holder. The shade holder fitter size refers to the bore of the opening of the holder through which the glass shade "fitter" passes.
The size of fixture-blazon shade holders and shades are, for the most part, standardized in N America and are found in several mutual sizes. Their fitter sizes and applications are as follows: ii 1/4" (electrical-era fixture shades), ii 1/2" (gasolier shades), 3 1/iv"(fixture & pendant), 4" & 5" (gas & pendant shades) and 6" (large pendant shades & hanging lamp camber shades).
Retrieve to back the setscrews out before you measure the shade holder'southward fitter. At that place are a few odd sizes that are occasionally found on erstwhile fixtures so make sure that you lot carefully measure the fitter.
Information technology is important to note that, mostly, the correct size of lampshade for both fixture-type and straight-type shade holders will have an actual measured fitter size that volition be slightly under the mutual and standard sizes, but never over. Below are some typical lampshade fitter sizes.
Common or standard sizes for straight fitter holders and shades are as follows: 1 5/8" (hurricane shades), four" (ball shades and some gas), six 1/4" (astral shades), 7", ten", 12" (student shades), and fourteen" (hanging lamp & dome shades).
Another holder type and fitter size, outside the realm of those listed above, is for torchiere floor lamps. Most all torchiere lamps accept a ii 3/4" fitter size, bugle-shaped shade holder. Look for two iii/4" fitter size shades for these large lamps.
Replacement glass lampshade pick should always brainstorm with a consideration of your lamp's shade holder fitter type, then fitter size. Fortunately, our catalog lists the correct fitter size for all of our drinking glass lampshades and tin serve as a handy reference.
Though there are a myriad of sizes and designs of drinking glass lampshades and lampshade holders, when it comes to choosing a replacement shade you lot needn't be intimidated. But remember to match your lamp's shade holder size (style & fitter) to the correct lampshade fitter size.
If your lamp requires a shade with an unusual fitter size, or maybe you have an early on antique or heirloom lamp that requires additional considerations in choosing an advisable replacement lampshade such as correct style and menstruum, please utilize our dealer locator to contact ane of our knowledgeable lamp parts dealers in your surface area. Well-nigh offer expert advice on antique and early on style lighting and will be glad to assistance you in making a good decision on replacement glass for your lamp or fixture.
Source: https://antiquelampsupply.com/blogs/guides/04-how-to-choose-glass-shade-size
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