Floor clearance on rolling box. - Woodworking Talk - Woodworkers Forum
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post #1 of 14 Old 07-02-2020, 09:33 PM Thread Starter
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Floor clearance on rolling box.

Building a cart/box/whatever to hold metal parts boxes, 5 to be exact. These boxes will hold machine screws, nut, bolts, washers, etc from 0-80 to 3/4-10. Accordingly it will be a good size box, about 18" deep, 42" wide. and (approx) 50+ inches high, and quite heavy when loaded.

Which leads me to the question - it will ride on 4 - 4" casters which will be attached to angle iron at the ends of the box, allowing the box to sit between the casters instead of on top, but how far from the floor? Flat and level concrete floor would probably allow only an inch or two clearance, but rough uneven floors might not be so workable.

According to the design, it I put the casters under the box, it's 5-1/2" off the floor, and I'm trying to keep the height down so I don't need a step stool to see in the drawers. Good news is the individual drawers have lids and can be removed from the rack. So, what say, how much clearance?

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post #2 of 14 Old 07-02-2020, 09:52 PM
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For a box that large, that you regularly walk up to, I would want enough clearance for my toes to fit beneath, so about 4

Also, should your casters fail, being able to fit a floor jack below the box would be nice.


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post #3 of 14 Old 07-03-2020, 06:34 AM
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My joiner, planer, router table, workmate, and a number of dollies all have 4" casters with no issues
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post #4 of 14 Old 07-03-2020, 08:33 AM
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Personally I would go with having the casters under the cabinet. My machinist tool box is 57 inches to the lip of the lid. It is also just as heavy as the rolling bolt bins we have at work.

Having the wheels extend beyond the cabinet presents a tripping hazard. Yes many rolling machine bases have extended wheels, however many of those machine have a larger table area which means there is still toe room. Your parts bin will not, plus if you drop a bolt and it rolls under the bin, much easier to retrieve with a bit more floor clearance. You get something jammed under there with only an inch or two of clearance may create some problems.

Can you go to an inch smaller caster and still be good on your load rating? A 3 inch cast iron swivel caster by Shepard Hardware is rated for 250lbs each. A 3 inch caster will not roll as easy as a 4 inch caster, but it would lower you overall height by 1.25 inch.

1-1/8 inch wide x 3 inch diameter cast iron silver wheel with heavy duty ball bearing swivel and plate mount
3 inch x 4 inch plate with 3-3/4 inch clearance height
250-lb load capacity

1-1/4 inch wide x 4 inch diameter cast iron silver wheel with heavy duty ball bearing swivel and plate mount
4 inch x 5 inch plate with 5 inch clearance height
500-lb load capacity

Last edited by Dave McCann; 07-03-2020 at 08:37 AM.
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post #5 of 14 Old 07-03-2020, 09:59 AM
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It's too narrow for them to go underneath!

Quote:
Originally Posted by Alchymist View Post
Building a cart/box/whatever to hold metal parts boxes, 5 to be exact. These boxes will hold machine screws, nut, bolts, washers, etc from 0-80 to 3/4-10. Accordingly it will be a good size box, about 18" deep, 42" wide. and (approx) 50+ inches high, and quite heavy when loaded.

Which leads me to the question - it will ride on 4 - 4" casters which will be attached to angle iron at the ends of the box, allowing the box to sit between the casters instead of on top, but how far from the floor? Flat and level concrete floor would probably allow only an inch or two clearance, but rough uneven floors might not be so workable.

According to the design, it I put the casters under the box, it's 5-1/2" off the floor, and I'm trying to keep the height down so I don't need a step stool to see in the drawers. Good news is the individual drawers have lids and can be removed from the rack. So, what say, how much clearance?
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Originally Posted by Dave McCann View Post
Personally I would go with having the casters under the cabinet. My machinist tool box is 57 inches to the lip of the lid. It is also just as heavy as the rolling bolt bins we have at work.

Having the wheels extend beyond the cabinet presents a tripping hazard. Yes many rolling machine bases have extended wheels, however many of those machine have a larger table area which means there is still toe room. Your parts bin will not, plus if you drop a bolt and it rolls under the bin, much easier to retrieve with a bit more floor clearance. You get something jammed under there with only an inch or two of clearance may create some problems.

Can you go to an inch smaller caster and still be good on your load rating? A 3 inch cast iron swivel caster by Shepard Hardware is rated for 250lbs each. A 3 inch caster will not roll as easy as a 4 inch caster, but it would lower you overall height by 1.25 inch.

1-1/8 inch wide x 3 inch diameter cast iron silver wheel with heavy duty ball bearing swivel and plate mount
3 inch x 4 inch plate with 3-3/4 inch clearance height
250-lb load capacity

1-1/4 inch wide x 4 inch diameter cast iron silver wheel with heavy duty ball bearing swivel and plate mount
4 inch x 5 inch plate with 5 inch clearance height
500-lb load capacity

As you install the casters with room for them to swivel underneath, the distance between wheel centers that carry the load will be about 16" , quite narrow for a heavy box over 50" high. AND when you pull out a drawer laden with heavy bolts, you have just changed the load to the drawer side making it even more tippy. Two drawers pulled out? Forget it!



My heavy machines are on outrigger caster supports:
https://www.woodworkingtalk.com/f12/...ablesaw-11044/



The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #6 of 14 Old 07-03-2020, 11:28 AM
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It would take a really, really bad pour if even an inch was not sufficient.


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post #7 of 14 Old 07-03-2020, 11:36 AM Thread Starter
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Quote:
Originally Posted by woodnthings View Post
As you install the casters with room for them to swivel underneath, the distance between wheel centers that carry the load will be about 16" , quite narrow for a heavy box over 50" high. AND when you pull out a drawer laden with heavy bolts, you have just changed the load to the drawer side making it even more tippy. Two drawers pulled out? Forget it!



My heavy machines are on outrigger caster supports:
https://www.woodworkingtalk.com/f12/...ablesaw-11044/


The casters extend front and back of the cabinet, not side to side, forming a base approximately 28" X 48" for a cabinet that is 18" by 45". All my machines are on casters, and most of them have extended bases. I know those casters sticking out somewhat could potentially cause a stubbed toe, (mine are all painted red), but it beats tipping something heavy over.

As to toe room, I have yet to walk up to any of my cabinets, machines, or tool boxes and put my toes under them. Just me I guess.

Bottom line I want to keep the top of the cabinet as low as possible without too much compromise.

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post #8 of 14 Old 07-03-2020, 11:48 AM
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Quote:
Originally Posted by woodnthings View Post
As you install the casters with room for them to swivel underneath, the distance between wheel centers that carry the load will be about 16" , quite narrow for a heavy box over 50" high. AND when you pull out a drawer laden with heavy bolts, you have just changed the load to the drawer side making it even more tippy. Two drawers pulled out? Forget it!



My heavy machines are on outrigger caster supports:
https://www.woodworkingtalk.com/f12/...ablesaw-11044/



I respectfully disagree. In fact your illustration shows exactly what I was saying. The casters you show do not extend beyond the outer perimeter of the table top, thus they are not a tripping hazard. Rolling bases like you show are quite common.

My tool box is 18 inches deep, 41 inches wide and 57 inches high, just like 20 other (not mine) personal tool boxes in the shop. All of them are on casters and most of them get rolled around the shop on a daily basis. All have the casters mounted under the box. I have been in multiple shops with rolling tool boxes and rolling parts/bolt & nut bins, never have I seen the casters extend beyond the box.

Can you tip them over if you open multiple drawers? That is why you don't open multiple drawers. Same thing would be true if the cabinets were sitting directly on the floor.
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post #9 of 14 Old 07-09-2020, 08:44 AM Thread Starter
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Overall it worked out, I can put the casters underneath, and the top drawer is still below eye level. Now to paint and add casters. Casters will still go on angle iron and protrude from front of cabinet the minimum necessary to swivel freely. Couple more internal plywood braces to be added, then 3/8" plywood back installed. It's getting there.
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post #10 of 14 Old 07-10-2020, 07:14 PM Thread Starter
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Update

Just a quick update - casters are on, lots of clearance, and top of box is at nose level. Next step is to paint the inside and add the plywood back, then install the cabinets, Last pic is just another shot of my "ugly bench", in use. Turned out to be even more handy than I thought it would be - woodworking, metal working, whatever.
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post #11 of 14 Old 07-11-2020, 03:09 PM Thread Starter
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Getting there -

Progress - not fun trying to build a "cabinet" with construction grade materials. Whole lot of fun trying to keep everything straight and square.
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post #12 of 14 Old 07-11-2020, 03:57 PM
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Quote:
Originally Posted by Alchymist View Post
Just a quick update - casters are on, lots of clearance, and top of box is at nose level. Next step is to paint the inside and add the plywood back, then install the cabinets, Last pic is just another shot of my "ugly bench", in use. Turned out to be even more handy than I thought it would be - woodworking, metal working, whatever.

Thats a pretty interesting looking clamping table in the bottom picture. Whats the core function it was built for, looks like it had fold down wings of sorts at the base or just a hold down on the side.


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post #13 of 14 Old 07-11-2020, 05:01 PM Thread Starter
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Shelf folds up (on the back side in the pic), the circular part you see is a lazy susan table that clamps on top when needed. I find myself using it for far more than I thought I would. Here's the build thread:
https://www.woodworkingtalk.com/f2/u...-bench-215679/

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post #14 of 14 Old 07-16-2020, 03:57 PM Thread Starter
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The rest of the internal bracing is in, inside painted, and cabinets installed. Left remaining is the top and outside painting. Functional as is, bottom grey cabinet is full, working on the others, Lots of sorting to do. Like the Lawson cabinets (brown) better than the Chromate ones, they seem a little better built, and the drawers interchangeable between the cabinets, whereas some of the Chromate ones wont fit in right cabinet, but fit OK in the left one. Quality control problem I guess. Not a problem, because the drawers won't be moving around between cabinets, and not often even removed from the cabinet.
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