Accessories: Spindles & Routers

Which one to choose - Router or High-Frequency Spindle?

ShopBots can be fitted with a variety of tools/heads for cutting and machining. The most common tools are a standard woodworking router or a high-frequency industrial spindle. These tools are similar in principle; basically a motor for turning a cutting bit at high speeds. A router (we recommend and sell a Porter Cable 3.25 hp router) provides the affordable solution for a CNC tool.

We also sell several high-frequency spindles that are the industrial grade solution for a CNC tool. Power (usually 3-phase) for a spindle is routed through an inverter that converts it to a higher frequency for powering the spindle/motor.

Spindles have the advantage of being more powerful (note that hp ratings between routers and spindles are not comparable) and will maintain their full torque down to much lower RPMs than a router.

Spindles have precision bearings, which mean less run-out and thus smoother and more accurate cutting. These bearings also stand up to continuous use better than those of a router.

Bearings in a heavily used router might need to be replaced every three-four months, while a similarly used spindle should be good for a year or two between bearing replacements. A high-frequency spindle is also much quieter in operation than a router.

For many shops, the cost and power requirements of a high-frequency spindle will be prohibitive. A ShopBot will certainly cut fine with a standard router. It is also possible to get started in CNC with a router, and then fit your ShopBot with a spindle at a later date.

If you don't need a heavy cut, and noise is not an issue, then a router is a safe choice. For heavy production situations, we recommend a spindle. In addition, the full performance capabilities of a PRSalpha are only realized with a spindle because a router will bog down in heavy cutting at higher cutting speeds.

Spindles are a special order item when purchased separate from a tool or as an upgrade. Spindles typically ship within 14 days. Contact us for specific availability.