An acrylic donation box is a four-part assembly, not a single cube: the body, a lid with a machined slot, a base, and a lockable door at the back. Museums and charities order them by the hundred, and the failures are almost always at the same three points.
The brief that produced this guide came from a heritage trust replacing 22 collection units. Sixteen of the old boxes had cracked at the lid slot within two years of opening.
Acrylic donation box construction: 5 mm cast sheet and solvent joints
- Body: 5 mm cast acrylic, solvent welded, joint polished flush
- Lid: 5 mm with an 8 x 90 mm slot, radiused ends, deburred and flame polished
- Door: hinged 5 mm panel with a cam lock and a bonded hasp plate
- Base: 8 mm for counter units, so coins do not drum on the bottom
Why the slot cracks, and what to do instead
A machined slot concentrates stress at its ends. A square-ended slot in 5 mm sheet starts a crack within a few hundred coin drops. Radiused ends, a 1.5 mm corner radius minimum, spread the load and add years of service. This is the single change that fixes most returns.
The second cause is joint quality. A solvent weld that was rushed, or polished before it fully cured, leaves a hazy line and a weak corner. On a box that is picked up and shaken, that corner is the first thing to fail.
Third is the lock. A cam lock screwed into a 5 mm acrylic door will pull through if someone leans on the box. Bond a 3 mm acrylic hasp plate behind it, or better, a stainless plate, to spread the load.
Wall-mounted units need one more thought: the mounting holes. Two 8 mm holes at the top corners, at least 25 mm from the edge, and a spacer behind so the box is not clamped hard against a wall. Acrylic expands and contracts with the room; a box bolted tight will craze at the fixing.
For the printed face, most buyers want a logo or a gift-aid panel. Screen printing on the reverse of a clear front panel keeps the image behind the acrylic and out of reach of hands. Our guide to acrylic retail signage and display covers the print and mounting options.
Dimension tolerance matters less than flatness. A box with a 1 mm bow will not sit level on a counter and will rock as people use it. Cut panels on a CNC rather than by hand, which is the point covered in the acrylic cut-to-size service guide.
Send your box dimensions, lock type and annual quantity to oversales@rpplexiglass.com for a fabrication quote.
Frequently Asked Questions
What thickness acrylic for a donation box?
5 mm cast acrylic is the industry default for counter and wall units up to 300 mm cube. Thin 3 mm sheet bows when full of coins and cracks at the welded corner; 8 mm is used only for large ballot boxes.
How is the box assembled?
Solvent welding on the four vertical joints, then a lid and base bonded or fitted with a locking door. The joint must be fully cured and polished before the drop slot is machined, otherwise the slot drags and cracks.
Can a donation box be made tamper resistant?
It can be made resistant, not certified secure. A cam lock, a bonded lid and a hasp plate defeat casual attempts; anything beyond that needs a metal cabinet, because acrylic can be cut with hand tools.