Hammond 1590LB enclosure dimensions

Wall thickness, casting taper and a free drill template

External, at the rim
50.6 × 50.6 × 27mm

1.99 × 1.99 × 1.06 in

Drilled face
49.3 × 49.3mm

the face you lay out

Usable flat area
37 × 37mm

inside the walls and bosses

Wall thickness
2mm

0.7 mm draft per side

Lay out a 1590LB →

Free in your browser, and it prints a true-size drill template.

The Hammond 1590LB is a small square enclosure, the same footprint each way. In pedal terms it is a mini format: one knob and a footswitch is a comfortable build, two knobs is a squeeze, and the jacks almost always go on the top face because the sides leave so little room.

1590LB drawing

AABB SECTION A-ASECTION B-B 49.349.3R5R4.2 BOSS2750.6 AT RIM(R1.5) EDGE2 WALL0.7 DRAFT(27) NOTES1.MATERIAL: DIE-CAST ALUMINIUM ALLOY2.INTERNAL CAVITY 45.4 x 45.4 AT THEDRILLED FACE3.USABLE FLAT AREA 37 x 37 INSIDE THECORNER BOSSES4.LID FIXING: 4 OFF 6-32 UNC5.HIDDEN LINES ARE THE INSIDE FACE OFTHE WALL AND THE CORNER BOSS KEEPOUT6.CASTING DRAFT DRAWN AT TRUE SCALE7.TOP EDGE ROLLOVER R1.5 NOMINAL, NOTA MEASURED FIGURE HAMMOND 1590LBDIMENSIONS IN MMSCALE: TO FITSOURCE: HAMMOND CADSTOMPBOXLAYOUT.COMTHIRD ANGLE
The drilled face, with the inside of the wall and the corner screw bosses as dashed hidden lines, and two sections cut on the centrelines showing the wall, the casting draft and the rolled top edge. Drawn from the CAD, so it agrees with the figures below it. Drag the drawing sideways to see the rest of the sheet.

Full specification

External footprint (at the open rim) 50.6 × 50.6 mm (1.99 × 1.99 in)
Drilled (top) face 49.3 × 49.3 mm (1.94 × 1.94 in)
Depth 27 mm (1.06 in)
Wall thickness 2 mm
Wall taper (per side, face to rim) 0.7 mm
Corner radius 5 mm
Screw boss reach (each corner) 4.2 mm
Internal cavity (at the face) 45.4 × 45.4 mm (1.79 × 1.79 in)
Usable flat area (inside the bosses) 37 × 37 mm (1.46 × 1.46 in)
Material Die-cast aluminium alloy
Lid screws 4 × 6-32 UNC

Figures are derived from Hammond's own STEP models and datasheets, the same data the editor and the comparison tool use. Official drawing, 3D CAD and specification sheet: Hammond's 1590LB part page.

How thick are the walls?

The 1590LB's walls are 2 mm thick. Like every diecast enclosure it also carries a casting draft: each wall leans out by 0.7 mm from the drilled face to the open rim, so the enclosure measures 50.6 × 50.6 mm at the rim and 49.3 × 49.3 mm across the face you drill. Worth knowing when a part seats against the inside of a wall, and why a caliper reading depends on where you take it.

What fits inside?

The internal cavity measures 45.4 × 45.4 mm at the face, and the screw bosses in each corner reduce the usable flat area for a circuit board to about 37 × 37 mm. To check a specific board, put its dimensions into the enclosure comparison tool's fit checker, or place the whole layout in the editor, which knows each component's real footprint and warns when something clashes with a wall or a boss.

1590LB drill template

The Stompbox Layout editor has the 1590LB as a built-in preset. Place your holes on it, and it prints a true-size PDF drill template with the enclosure outline, every hole position and a ruler to verify your printer's scale. Free, no download, runs in the browser.

Printed at 100% scale it works as a drilling template: tape it to the enclosure, centre punch each mark, then drill. Our guide to hand drilling a pedal enclosure walks the whole job, bit sizes included.

A 3D printed drill jig sitting over a pedal enclosure.

3D printable drill jig

Nothing to tape down, nothing to slip, and it wraps the sides so the jacks line up. The editor makes one from your own layout, for the exact enclosure you picked, $29.

See the drill jig →

How the 1590LB compares

Enclosure External at the rim Drilled face Depth Usable flat area
1590LB (Hammond) 50.6 × 50.6 mm 49.3 × 49.3 mm 27 mm 37 × 37 mm
1590A 38.5 × 92.6 mm 37.1 × 91.2 mm 27 mm 25.6 × 79.7 mm
1590LB (Tayda) 50.6 × 50.6 mm 49.3 × 49.3 mm 27 mm 36.9 × 36.9 mm

1590LB vs 1590A

The 1590A is 12.2 mm narrower and 41.9 mm taller than the 1590LB. Both are mini formats. The 1590A gives you a taller face for a conventional knobs-above-footswitch layout; the 1590LB suits square, minimal builds.

Hammond vs the Tayda 1590LB

Tayda's 1590LB-style enclosure is its own casting, not a relabelled Hammond, and we measure both. Across the drilled face it runs +0 mm in width and +0 mm in height against the Hammond, with 2 mm walls (Hammond: 2 mm) and 27 mm of depth (Hammond: 27 mm). A drill layout made for one fits the other for ordinary builds; re-check tight clearances near the walls and corners. Both castings are in the comparison tool if you want them drawn to scale.

1590LB FAQ

What are the dimensions of a 1590LB enclosure?

A Hammond 1590LB measures 50.6 × 50.6 mm × 27 mm externally at the open rim (1.99 × 1.99 in). The drilled face measures 49.3 × 49.3 mm, and the usable flat area inside the walls and corner screw bosses is about 37 × 37 mm.

How thick are the walls of a 1590LB?

The 1590LB's walls are 2 mm thick, with a casting draft of 0.7 mm per side from the drilled face to the open rim.

Is there a drill template for the 1590LB?

Yes. The free Stompbox Layout editor includes the 1590LB as a preset and prints a true-size PDF drill template of your layout, with a ruler to verify print scale.

Every enclosure size

1590A

37.1 × 91.2 mm face, 27 mm deep

Dimensions →

1590B

59.3 × 111.2 mm face, 27 mm deep

Dimensions →

1590BS

58.6 × 110.1 mm face, 38 mm deep

Dimensions →

125B

63.6 × 119.3 mm face, 35.8 mm deep

Dimensions →

1590BB

116.9 × 91.4 mm face, 30 mm deep

Dimensions →

1590BB2

118.1 × 92.6 mm face, 33.8 mm deep

Dimensions →

1590BBS

117.8 × 92.3 mm face, 38.1 mm deep

Dimensions →

1590J

143.4 × 93.4 mm face, 45.1 mm deep

Dimensions →

1590XX

143.4 × 119.4 mm face, 35.2 mm deep

Dimensions →

1590P1

80.6 × 150.6 mm face, 46.4 mm deep

Dimensions →

1590DD

185.7 × 117.7 mm face, 33 mm deep

Dimensions →

Or see them drawn to scale, side by side.

Plan your 1590LB layout

Place the drill holes on a 1590LB in the editor, check everything clears the walls and the screw bosses, then print a true-size PDF drill template. Free, in your browser.

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