What size Brass Block

[coloradoman25]

For a top mount OFR. This is going on the KnE Body Star project

[djpharoah]

I think 37mm is for Non=recessed OFRs, and 42mm is for thick arch tops. So you'd need a 37mm.

[toejam]

Depends. 37mm or 42mm can be used for non-recessed Floyds. All the old Charvel Model series that had the JT6 used 42, and they were not archtops. My '05 Charvel Star used 37.

[coloradoman25]

Thanks Guys I think ill just snag a 37 and be done with it.

[sixstringer]

Top mount OFR had 42mm stock. 37mm were used for a recess.

[toejam]

Top mount OFR had 42mm stock. 37mm were used for a recess.

No, typically 32mm are used for a recess. Did you read my post about the '05 Charvels using 37 and being non-recessed?

[axmann]

32mm typical in recessed(some oddballs are 34mm)and 37mm or 42mm in non recessed,it can depend on the guitar though. Just what I have dealt with.

[sully]

Listen to axmann, for he knows of what he speaks!

[tonesfoyobones]

32mm typical in recessed(some oddballs are 34mm)and 37mm or 42mm in non recessed,it can depend on the guitar though. Just what I have dealt with.

I just upgraded my Floyd recessed and it took the 32mm. I can't speak of the other sizes but you can rule that one out.

[moku]

32mm typical in recessed(some oddballs are 34mm)and 37mm or 42mm in non recessed,it can depend on the guitar though. Just what I have dealt with.

i agree. the thing to remember is, once the block is in place and the springs are hooked on, the springs have to lay parallel to the body. they can't be on an angle. so it's going to be either 42mm or 37mm. otherwise, if the springs are hooked on an angle, they may not sit right (too tall the cavity cover won't close and too low the springs will slip out). so it deoends on the guitar the depth of the spring cavity cut and such.

[adampone]

do you have a means to check with another FR you may have? a spare or one in another guitar you can take out?

all my non-recessed top-mounts are 42mm. that includes Strat, ESP, original Kramer. except for my EBMM, which is 40mm. all my other recessed are 37mm. the only 32mm I have are a Charvel and a Jackson, which are both recessed.

you should defintely be safe with 37mm, unless you just want to be sure to get every square mm of real estate filled with that brass. if you're not certain, check with one or all of the brass sustain block suppliers out there and ask. and if you're going with a big block (1/2" thick), be certain you have plenty of space in the cavity if you want to pull up - trust me on that.