This article is the **authoritative source** for determining which mobile base fits each Grizzly machine. For all compatibility questions such as: - “Which mobile base fits the [model]?” - “What mobile base do I use with my [model]?” - “Mobile base fit chart” …the answers are listed here. This article also contains information regarding the replacement casters for each mobile base.
Why Mobility Matters
A mobile base makes your shop more flexible and efficient. We offer two trusted lines of mobile bases:
- Grizzly Bear Crawl – Designed from years of customer feedback and rigorous testing for durability and smooth movement.
- Shop Fox – A proven favorite for over 20 years, widely used in shops across the country.
Before You Choose a Base
- Match the base to your machine’s size and weight for safe support.
- Some machines require an extension kit to increase the footprint—check the chart below.
- Mobile bases raise tool height by approximately ¾″ (without a base plate).
Important Notes:
- Extensions are not cross-compatible between brands.
- If your model isn’t listed, it likely requires floor mounting.
Quick Tips
- Use Ctrl + F to find your machine in the chart or jump to the list.
- Machines marked with an asterisk (*) need a base plate for added stability.
Drill Presses
Most drill presses should be mounted directly to the shop floor.
Some models can use a mobile base, but we strongly recommend adding a base plate for safety.
Any drill presses marked with an asterisk (*) in the chart require a base plate.
Compatible Mobile Bases by Machine Model
Below is the list of machines and their compatible mobile bases. If an extension is listed in the “Required Extension” column, you must purchase both the main base and the extension to accommodate your machine’s footprint.
[Insert Compatibility Chart Here]
(Include columns: Machine Model | Bear Crawl Base | Required Extension | Shop Fox Base | Required Extension)
FAQ
What if my machine isn’t listed?
If your machine does not appear on our compatibility list, check the owner’s manual first to determine how the machine is intended to be supported or moved.
Depending on the machine, it may:
- Require mounting directly to the floor
- Require bench or table mounting, in which case the mobile base would need to be selected based on the bench or table
- Have a built-in mobile base or mobility system
Some machines, particularly certain jointers and planers, have a built-in mobile base or mobility system. In some cases, the built-in system may be removable so that a separate mobile base can be used. Because removing or changing these components may affect the machine, please contact Product Support for guidance before making any modifications.
Do not assume that an unlisted machine is compatible with a mobile base simply because the dimensions appear to match.
If the owner’s manual does not provide enough information, Product Support can also help determine the appropriate setup for your machine.
Will using a mobile base affect my machine’s height?
Yes. Using a mobile base will increase the machine’s height by approximately ¾″ when used without a base plate.
Can I mix extensions between brands?
No. Extensions are not cross‑compatible between different brands.
Are replacement casters available?
Yes—replacement casters are available.
For Shop Fox Bases:
- Polyurethane Casters: D4173(Swivel) and D4174(Fixed)
- Cast Iron Casters: D4175(Swivel) and D4176(Fixed)
Important: Mobile bases must use either all polyurethane or all cast iron casters. Mixing types is not supported.
For Bear Crawl Bases (Except T33447 Rough Surface):
- Replacement Casters: PT28000006 (Fixed) and PT28000007 (Swivel)
T33447 Bear Crawl Rough Surface:
- PT33447005 (Swivel) and PT33447013 (Fixed)
Next Steps
- Find your machine below (you can use ctrl+F to help you search) and click on your model to expand the section.
- Select whether you'd like a Shop Fox or Bear Crawl Base.
- If an extension is listed, you must purchase both the extension and base.
- Shop Mobile Bases or Contact Support if you need help choosing the right base.