Industry
Part of Modular workbenches comparison: criteria, not product picks
How small-shop makers standardize modular workbenches
How small-shop makers standardize modular workbenches: one shared height, a single hole grid, machines mounted in the bench, and the rules when you sell.
What to take away
- Small shops standardize on one working height so every surface can support the next one. That single decision does more than any accessory.
- One hole grid, one clamp family, one set of dogs. Mixed systems are the reason modular workbenches end up used as tables.
- Mounting a machine into a bench module turns the bench into machine framing, with the guarding questions that implies.
- If you sell what you make on it, a different set of product rules starts to apply to your output.
This describes common practice in one-person and small shops rather than any particular workshop. Nobody was interviewed, and no equipment was tested. What follows is worth reading less as a description of other people and more as a set of decisions you will eventually make yourself, usually twice, because the first version rarely survives contact with real work.
One height, everywhere
The habit that separates a working shop from a collection of furniture is a single reference height. Outfeed tables, assembly benches, mobile carts and machine tables are all set to the same figure, so any surface can support work coming off any other.
Pick the height by measuring your own body instead of reading a chart. Stand with your arms hanging, mark the height of your wrist crease on a wall, and set a temporary surface there. That height keeps your shoulders over the cut for hand planing and chisel work. Assembly, sanding and routing want the work lower, so your arms come down onto it.
Whichever figure you land on, apply it without exception. Shims, adjustable feet and a long level are cheap. Rebuilding a cart because it is an inch proud is not.
One grid, one clamp family
Modular benches sell accessories, and the temptation is to buy across systems. Independent shops tend not to, because the value is in interchangeability rather than in variety.
- Pick one hole diameter and spacing, and drill everything to it. Two grids already exist: 20 mm holes on 96 mm centers, the pattern Festool uses on its MFT/3 tops and the one aftermarket dogs, clamp elements and stops are commonly cut for, and a traditional bench grid of 3/4 in (19 mm) dog holes.
- Buy dogs, holdfasts and stops that fit that grid, and settle on one clamp family as well. The clamp families that matter here are built by Bessey, Festool, Veritas and Kreg; pick one and stay in it, because a holdfast cut for a 3/4 in hole will not hold in a 20 mm one.
- Build your own jigs to the same grid so they register without measuring, and if you add T-track, keep it in the family you already chose.
The result is a bench where a fixture drops into known positions. That repeatability is the real product.
The systems that already exist
You do not have to invent a standard, because a handful of products already define one.
- Festool MFT/3 and MFT-style tops.The 20 mm grid on 96 mm centers is the closest thing the trade has to a shared standard, and aftermarket tops, dogs and clamp elements are cut to it.
- Traditional European benches, such as Sjöbergs.Solid beech, a vise at each end and round dog holes on the 3/4 in pattern that holdfasts and bench dogs are sized for.
- Folding and portable benches, such as the Black & Decker Workmate or the Kreg Mobile Project Center.Handy as a second surface or for site work, but their clamping is proprietary, so they do not join your grid.
- Multifunction slabs.A sheet-goods top on a frame, drilled to the grid you chose, and usually the quickest way to make a second surface that matches the first.
- T-track and MFT profiles.Track gives you a slot instead of a hole, which takes sliding stops and fences but no dogs. Pick track or a dog grid, not both, unless a specific job earns the second system.
Rockler and Lee Valley's Veritas line sell most of this hardware by the piece, so you can fit out a bench to the grid and the clamp family you chose instead of buying a package.
Machines in the bench become machine framing
Once a router, sander or small saw is mounted into a bench module, the bench is part of the machine. That means the moving parts, drive belts and pulleys sit at bench height in a room where people lean.
The federal rule on mechanical power transmission apparatus is OSHA 29 CFR 1910.219. It covers the guarding of belts, pulleys, shafts and couplings, including the enclosure of drives within reach of a working position, and it governs workplaces rather than a private garage. The relevance here is the geometry: a belt drive under a bench is exactly the sort of thing a sleeve or a sanding cloth finds.
Enclose the drive, keep the guard fitted, and design the module so you can reach the switch without reaching past the machine.
Selling work made on the bench
The moment your output goes to other people for money, it becomes a consumer product. The rules attach to the product, not to your shop.
The Consumer Product Safety Commission's Regulatory Robot, the agency's step-by-step guidance tool for small makers, walks through which requirements apply to a given item. That beats guessing. Products for children carry substantially more obligation than furniture for adults: they generally need testing by a CPSC-accepted third-party lab and a Children's Product Certificate before they can be sold.
If you are choosing between those systems, our guide to choosing a modular bench walks through the trade-offs, and our piece on how small shops arrange a room covers the layout these benches sit in.
