We get enough questions about Gibson pole spacing versus Fender pole spacing that it’s worthwhile writing about here in our weekly blog.
The best way to proceed is to review the most common questions.
But first, we’ll start with some basics…..like, what do you mean by Gibson spacing and Fender spacing?
That terminology is actually referring to the physical spacing between the pole pieces. This roughly corresponds to the distance between the strings themselves, but not entirely. (More on that point later). In general terms, the spacing between pole pieces is slightly wider on Fender style pickups, and slightly narrower on Gibson style pickups. The overall difference – when you measure from the centers of the 2 outside pole pieces – is roughly 2 to 3 millimeters. In other words, if you measure from the center of the high E pole piece to the center of the Low E pole piece, a Gibson spaced pickup will measure right around 50 millimeters. A pickup with Fender spacing will measure between 52 and 53 millimeters, depending on the pickup.
This week we’ll discuss how this applies to Humbuckers:
Question 1: How wide is the Fender pole spacing and how wide is the Gibson pole spacing on the Lollar Imperial humbuckers?
Our traditional Gibson style Lollar Imperial humbuckers have a pole spacing of about 50 mm, as measured from center to center of the two outside pole pieces.
Our Fender spaced (F-spaced) Imperial humbuckers have a pole spacing of about 53 mm, as measured from center to center of the two outside pole pieces.
Question 2: Will I need a longer route if I install a Fender spaced humbucker?
The outer dimension of all of our (six string) full sized Lollar Imperial humbuckers is exactly the same. The difference between the two pickups is in the spacing of the poles as they’re positioned on the inside of the pickup. In other words, when a metal humbucker cover is machine stamped, the outer rectangle or “box” is the same size. But it’s the distance in between the individual pole pieces that is different. They are stamped through the metal box in slightly different positioning.
Take a look at these two photos. You’ll see that the outer dimension of the two humbuckers is exactly the same, even though they each have a different pole spacing.
Question 3: How do I know if I need Fender spacing or not?
This is one of those questions that – to a certain degree – needs to be answered on a “case-by-case basis.” But that being said, generally speaking, if you are purchasing full sized Lollar Imperial humbuckers for a standard Gibson style guitar, then it’s not an issue. You need standard Gibson style humbuckers. However, if you are installing humbuckers onto a guitar that could be considered a “Fender” style guitar, then you’ll want to evaluate the need for a Fender spaced bridge. The most direct approach is to start by measuring the string spacing, right at the bridge.
Question 4: I want to set up my strat with an S-S-H (single-single-humbucker) configuration. Do I need an F-spaced Imperial bridge?
Yes, in most cases. The only exception to this would be if – somehow – a Gibson style bridge had been installed onto a Strat style guitar. That would be more of a “fluke” than anything else. Say, for example, a home-made “Frankenstein” guitar made from parts you happened to have on hand. As far as we know, there are no Gibson style bridges being installed onto Fender style guitar modifications or “clones” of any sort.
Question 5: Do I need an F-spaced Lollar Imperial for my Tele neck?
Probably not. Most of our players, and builders, install a standard Gibson spaced Imperial humbucker in a tele neck. As you know, the string spacing itself becomes narrower as the strings span from the bridge saddles to the nut. Even though it’s a Fender style guitar, the string spacing at the neck position can usually accommodate a standard Gibson spaced neck pickup.
Question 6: My pole pieces don’t line up exactly under my strings, is that a problem?
This is actually completely common for standard guitars. If you think about it, the strings are never the same distance apart as they span from the bridge to the end of the neck. They are furthest apart at the saddles of the bridge, and closest together when sitting at the nut. In between, they sit at various distances apart. That means no two positions on the guitar will relate to a pickup’s pole piece spacing in exactly the same way.
Take a look at this photo. If you look closely, you’ll see that when the strings are closest to the bridge, they actually sit a little wider than the pole pieces of the humbucker pickup. Now take a look at the strings’ position further down the guitar, when they are sitting over the neck pickup. Notice how the strings sit a little more closely aligned with the humbucker pole pieces. This is true for all guitars: If the string spacing at the bridge is wider than the string spacing at the nut, the pole pieces and strings will line up a little differently at each pickup position.
To learn more about our various types of humbuckers, follow this link to the Lollar humbucker section of our web site.
Next week we’ll talk about how to apply these same ideas to projects with single coil pickups.