Union Pacific / Wooden tender
Big Boy Tender.
Build the matching tender for your Big Boy locomotive. Laser-cut plywood, Union Pacific lettering and details from the roof down to the wheels.
Digital laser-cut files · SVG + DXF
38.8 cm length at 3 mm thickness · Locomotive sold separately
01 /The tender
The other half of the Big Boy.
The long side panels carry the Union Pacific lettering above a row of wheel assemblies. Ladders rise at the ends, with rails and hatches along the top.
At 388 mm long in 3 mm plywood, the tender is a separate build designed to accompany the Big Boy locomotive. Choose the matching material versions for the pair.
01. The tender388 × 115 × 152 mm / At 3 mm plywood
02 /In the details
Follow the details.
Take a closer look at the roof, ladders and wheel frames, then see where the tender meets the cab.
Follow the rails along the top of the tender. The long roof panels, hatch outlines and slatted section show the smaller details above the body.
Roof and hatch detail / From above
Wheels and ladder / A closer look
End-panel construction / Rear angle
Tender and cab / Locomotive sold separately
The Big Boy pair / Two separate designs
Alongside the locomotive
Made for
the same shelf.
See how the tender sits behind the Big Boy’s cab. The two models share the plywood construction and Union Pacific identity. Their files are purchased separately.
03 /At your workbench
Prepare the plywood. Build the tender.
Measure the material.
Check the actual plywood thickness and choose the matching supplied version. Test the slots and kerf on a small cut.
Check the layout.
Open the design in your laser software and check that the cutting layout fits your machine’s work area.
Follow the guide.
Use the included PDF assembly instructions as you put the tender together.
Material and scale / Test the fit before cutting
Keep the pair in proportion.
If you change the scale, enlarge every part equally. Slots and tabs change too, so the plywood thickness must increase in the same proportion.
The download includes versions for 3 mm and 1/8 inch plywood. Other material versions are available on request; they are separate from the standard download.
View the tender on EtsyBefore you start.
- Material
- Plywood
- Supplied versions
- 3 mm / 1/8 inch
- Finished size at 3 mm
- 388 × 115 × 152 mm
Length × width × height - Design formats
- SVG + DXF
- Assembly guide
- PDF included
- Download contents
- Tender files only
What comes in the download?
SVG and DXF design files for the tender, versions for 3 mm and 1/8 inch plywood, and PDF assembly instructions. Check that your laser software opens the supplied formats.
Is the locomotive included?
The locomotive is a separate design and purchase. Follow the Big Boy model link below to see its dimensions, details and file information.
Can I change the scale or thickness?
Scale all parts equally and adjust the material thickness in the same proportion. For example, a 3 mm design at 150% needs approximately 4.5 mm actual plywood. The finished dimensions also change. Test the fit before the full cut, or contact 21CNCStudio about another material version.
Can I sell finished models?
The files are for personal use. Contact 21CNCStudio before commercial use or selling finished models. Do not resell, share or redistribute the digital files without permission.
AI visualizations based on 21CNCStudio model renders.
The companion model
Meet the Big Boy 4014.
The matching locomotive is an 870 mm build in 3 mm plywood, with approximately 600 parts. Explore its cab, running gear and assembly information.
Explore the locomotive04 /From my studio to your workbench
Build the matching tender.
Get the Big Boy tender laser-cut files and PDF assembly guide from the 21CNCStudio Etsy shop.
Get tender files on EtsyDigital download · Tender onlyLocomotive sold separately. No physical model or materials are shipped.