Ibanez TMB30

Unofficial Specifications And Reference Guide

Ibanez TMB30



Specifications and Diagrams

Wiring / Controls

Drop-In Replacements

Compatible Strings

3D Printed Upgrades


The Ibanez TMB30 is a solid body 4 string electric bass guitar with passive P and J pickups. Production began Nov 2015. The TMB30 is manufactured in Indonesia.

These specifications were obtained from the following sources:

All part numbers are Ibanez numbers unless otherwise noted. Ibanez part number suffix CH = Chrome, BK = Black.

This website is not affiliated with Ibanez or Hoshino (U.S.A.) Inc. These specifications are subject to change and may not be accurate.

Please email additions, corrections and suggestions to


Model TMB30
Scale 30” (762mm)
Overall Length (Including Strap Button) 41.4" (1051mm)
Overall Width 13" (330mm)
Body Thickness 1.6" (40.6mm)
Weight (Approximate) 8 lbs ± 0.5 lbs
Wood Type (Body) Poplar
Wood Type (Neck) Maple
Wood Type (Fretboard) Jatoba
Strap Button Model 4EP1C2C
Pickguard Model 4PG1PC0018
Pickguard Type 3 Ply
Pickguard Thickness 0.09" (2.2mm)
Pickguard Width 8.5" (216mm)
Pickguard Height 10" (254mm)
Pickguard Screw Type #4-24 / M3 (unverified), Oval Head, Phillips, AB Point
Pickguard Screw Nominal Thread Diameter 0.117" (3mm)
Pickguard Screws Total Length (Including Head) 0.5" (13mm)
Pickguard Screws Head Diameter 0.23" (5.5mm)
Strap Button Screw Type #8, M4 (unverified), Oval Head, Phillips, AB Point
Strap Button Screw Nominal Thread Diameter 0.16" (4mm)
Strap Button Screws Total Length (Including Head) 1.1" (28mm)
Strap Button Screws Head Diameter 0.3" (7.5mm)
Paint Color (Ivory) PPG: Sawdust
Benjamin Moore: Sundress
Hex: #fbe4af
Ibanez TMB30 Pickguard Dimensions Ibanez TMB30 Dimensions

PPG Sawdust is the closest matching paint I've found, but it's not an exact match. Please contact me if you've had the paint matched.

I believe Ibanez uses metric screws, however, Imperial sizes are close enough to generally be acceptable replacements.


Neck Name TMB4
Neck Model 1NK1PC0365-BK
Frets (Number) 20
Fret Size Medium
Neck Radius 9.45” (240mm)
Width At Nut 1.61” (41mm)
Width At Body / 20th Fret 2.44” (62mm)
Thickness At 1st Fret 0.85” (21.5mm)
Thickness At 12th Fret 0.97” (24.5mm)
Nut Model 4N4132401R-PIV
4NT1MC0006 (discontinued)
Nut Width 1 5/8" (41mm)
Nut Height 3/16" (4.8mm)
Nut Thickness 1/8" (3.3mm)
Neck Screw Bushing 4NSB1450-BK
Inlay Shape Dot
Inlay Diameter 0.24" (6mm)
Inlay Color White(ish)
Truss Rod Wrench Size 4mm
Tuning Machine Hole Diameter
(Ferrule Insert Outer Diameter)
11/16" (17.5mm)
Tuning Machine Ferrule Insert Inner Diameter 0.55" (14mm)

The factory supplied truss rod hex key / Allen wrench measures 3.93mm.


Note: Ibanez has used two different bridges on the TMBs. They are not interchangeable.

Bridge Name B10
Bridge Model Newer Style: 2BB14-CH
Older Style: 2BB1PCA001
Mounting Holes (Quanity) Newer Style: 6 (4 / 2)
Older Style: 5
Mounting Hole Spacing Newer Style: 0.75" (19mm) / 2.12" (53.8mm)
Older Style: 17.5mm
Intonation Screw Newer Style: M3-0.50mm
Older Style:
Saddle Height Screw Wrench Size Newer Style: 2mm
Older Style: 1.5mm
Ibanez TMB30 Bridges


P Pickup Name (Neck) Dynamix P
P Pickup Model (Neck) 3PUDXPP0-FBN
J Pickup Name (Bride) Dynamix J
J Pickup Model (Bride) 3PUDXJEJ0-FBN
P Length 1.1" (27.9mm)
P Width (side to side) 2.25" (57.3mm)
P Width (with mounts) 2.63' (66.8mm)
P Height
J Width (side to side) 3.65" (92.6mm)
J Length (with mounts) 1.12" (28.5mm)
J Length 0.78" (19.8mm)
J Height
J Cavity Width 3.75" (95mm)
12th Fret to P1 Distance 9.75" (248mm)
12th Fret to P2 Distance 10.88" (276mm)
12th Fret to J Distance 13.13" (334mm)
Ibanez TMB30 P Pickup Ibanez TMB30 J Pickup

The 12th fret to pickup distance is measured from the fret wire to the center of the pickup. The 12th fret is just an arbitrary reference point.

Tuning Machines

Tuning Machine Model 2MM0034L, 2MM0034R
Tuning Machine Weight (Each) 3.0 oz (85g)
Tuning Machine Shaft Diameter 0.55 in (13.9mm)
Tuning Machine Mounting Screw Thread Diameter 0.1" (2.5mm)
Tuning Machine Mounting Screw Thread Length 0.4" (10.2mm)
Tuning Machine Mounting Screw Overall Length 0.5" (12.7mm)
Ibanez Tuning Machine

The factory tuning machine shaft diameter is 13.9mm. The ferrule insert inner diameter is 14mm and the headstock hole diameter (ferrule insert outer diameter) is 17.5mm.


String Spacing 0.75” (19mm)
String Gauge (Factory) 0.045 – 0.065 – 0.085 – 0.105
Bridge to Tuner Shaft (E) 33.5" (851mm)
Bridge to Tuner Shaft (A) 35.5" (902mm)
Bridge to Tuner Shaft (D) 37" (940mm)
Bridge to Tuner Shaft (G) 33.75" (857mm)
String Retainer Model 4TH1MC0001
Ibanez TMB30 Bridge To Tuner

The "Bridge to Tuner Shaft" length may be used to determine the maximum string length without the fat part of the string beginning to wind around the tuner shaft.

Wiring / Controls

Control Knob Model 4KB1PC0002
Control Knob Shaft Hole 6mm, Spline, No Set Screw
Control Knob Diameter (Main, Brim) 15.5mm, 20mm
Control Knob Height 11mm
Output Jack Model 3JKO6S001-CH
Output Jack Type Tip, Sleeve
Output Jack Size 0.25" (6.3mm)
Jack Plate Model 4JKPTMS-CH
Jack Plate Length 4.92" (125mm)
Jack Plate Width 1.38" (35mm)
Control Assembly Model 3CA0002R
Control Assembly Type 2 volume, 1 tone
Potentiometer Value (P Volume) B500K (Linear Taper)
Potentiometer Value (J Volume) B500K (Linear Taper)
Potentiometer Value (Tone) A500K (Audio Taper)
Potentiometer Shaft 6mm, Split, Spline
Potentiometer Shaft Split Gap 0.035" (0.89mm)
Potentiometer Spline Length 0.32" (8mm)
Potentiometer Thread Diameter 0.3" (7.7mm)
Potentiometer Thread Length 0.39" (10mm)
Potentiometer Body Diameter 0.65" (16.5mm)
Potentiometer Overall Height 1.06" (27mm)
Pickguard Potentiometer Hole Diameter 0.35" (8.9mm)
Ibanez TMB30 Wiring

Replacement Part Compatibility

Bill and Becky Wilde P-46 pickups are a direct drop-in upgrade. Most standard P pickups (Seymour Duncan Quarter Pound SPB-3, EMG, etc.) should also be a drop-in replacement.

EMG J pickups are available in at least two widths: 91.2mm (neck) and 94mm (bridge). I believe EMG PJ sets generally have a 94mm J pickup. The Ibanez Dynamix J pickup is 92.6mm wide. The TMBs pickup cavity may require a small amount of sanding when using a 94mm wide EMG pickup. Source: Climax,

Epic Custom Shop 92mm length J pickups require a small amount of sanding and new screw holes.

Gotoh VK1-18, VK1-19 knobs have 6mm smooth (no splines) shaft holes with a set screw and will fit the factory pot shaft.

Gotoh GB350 tuning machines are a drop-in replacement if the Gotoh ferrules (14mm outer diameter) are placed into the TMB factory ferrules, (14mm inner diameter) and a new screw mounting hole is drilled.

HipShot HB7 tuners have 18mm ferrules so the 17.5mm headstock holes will need minor sanding. The mounting plate of the tuning machines may slightly overlap, so one of the plates may need to be cut or sanded a bit. New screw mounting holes are required. Source: eastcoasteddie, and continued on post #2747.

Hipshot Licensed 3/8" Ultralite Bass Tuning Machines have a shaft diameter of 13.75mm. Shimming around the shaft is required to prevent a sloppy fit. Wrapping about 9 inches of tape around the shaft will shim it to 14mm and they can be placed into the factory ferrules. However, the shaft will only enter the ferrule to a depth of 1mm, which will likely be adequate, but does not make me confident. As an alternative, a plastic or nylon bushing, sleeve bearing or spacer measuring 9/16" I.D. x 11/16" O.D. may be placed between the tuner shaft and the headstock hole. Unfortunately, I've had a difficult time finding a suitable bushing. I used Redline (Trailer Parts Pro) model SP05-020 (or SP05-040) bushings trimmed to a length of 8.5mm. The bushing required a few inches of tape around the outside to make a snug fit into the headstock hole. The tuner shaft required a few inches of tape to make a snug fit in the bushing. A new screw mounting hole is required. Although these tuners can be made to fit, I personally do not recommend using them in the TMBs. The Gotoh GB350 tuning machines offer a much easier fit. Please contact me if you have a good solution.

Hipshot USA 1/2" Ultralite Bass Tuning Machines require a 17mm or 17.5mm hole. They may be used with the factory ferrules with a small about of tape around the posts to shim. New mounting holes are probably needed. Source: Blues Bass 2,, bigthemat,

Hipshot USA 3/8" Ultralite Bass Tuning Machines require a 14mm hole and may be a drop-in replacement with possible shimming and with a new screw mounting hole. (Unverified)

Grover Vintage Bass Machines (142 Series) are a drop in replacement with two new mounting holes drilled for the bottom side of each tuner. Source: mr80htz,

Jack plate model JP-CST-C (chrome), JP-CST-B (black) are drop-in replacements.

Plastic nut model BN-2210-023, BN-2350-000 at may be drop-in replacements.

The Gotoh 201B-4 bridge has 17.5mm mounting hole spacing and is a drop in replacement for old style bridges.

The Hipshot KickAss bridge has 17.8mm between mounting holes. The old style bridge has 17.5mm between mounting holes. The difference is small enough that you can mount a kickass bridge using the factory holes without too much trouble, but the outer screws may be a bit tilted. The new style bridges have a completly different mounting hole pattern, so new holes will need to be drilled.

A Fender Precision bridge cover fits over the stock bridge. Source: ThumpingJack,

Pots made by Taiwan Alpha with a "K Type" 6mm knurled shaft will fit the factory knobs and Gotoh VK1-18, VK1-19 knobs. The "R Type" smooth shaft has a 6.3mm diameter and will not fit. Pots should have a threaded shaft diameter of M9 (8.9mm). Pots mounted in the jack plate should have a threaded section (bushing) at least 6mm long. Pots mounted in the pickguard should have a threaded shaft section at least 5mm long. Some pots have imperial or standard sized threaded shafts with a diameter of about 3/8" (0.38"), e.g. CTS, but the TMB pickguard pot holes are only 0.35" (8.9mm) diameter. Metric pots with a threaded shaft diameter of 0.3" (7.7mm) are drop in replacements. Credit: ThumpingJack,

Please let me know how your replacement parts fit in your TMB30. Please include the part's model number, manufacturer and/or other info. Email:

Compatible Strings

La Bella 760FS-S Deep Talkin’ Bass Flats – Standard 45-105, Short Scale. Source

Please email the model number of strings you've used to

3D Printed Upgrades

Gotoh Resolite adapter plate by Annabelle's Workshop. A cool 3D printed plate that fits around Gotoh Resolite tuning machines on the back of the headstock to hide the factory mounting holes.

Ramp by Annabelle's Workshop. A cool 3D printed ramp for the TMB35 with simulated wood grain.

Please email me your 3D printed designes for the TMB30 at