is the bottom pivot a rounded ball or a flatter surface that only allows motion in side to side/front to back direction?
157023
Yes, the bottom pivot is a rounded ball, so you can move it in all directions.
157024
It's rounded on the bottom thus will move in any direction. It's small diameter makes balancing a challenge.
157025
It actually has a structured bottom that angles inward to the "base". The base is a flatter surface about 4" wide and creates the stable center. It's the structured buildout around it that allows for the "wobble" of it, allowing the development of better balance. It's very sturdy.
1575007
It pivots a little but not much. The legs adjust separately so you can have the bipod on an uneven surface
619845
The sides are rounded as a design, but the actual bottom is flat. Stability is not an issue. I love mine and it's large enough that both my husband and I can have more than one cup of coffee.
456247
The bottom is a bean bag like weighted base. But I would guess the plastic notches are hollow. My dashboard is somewhat sloped so the angle to view it is straight on. Also there are multiple notches to choose from. Don't think you would need to modify.
1224422
It does a forward backward and sideways type of motion. Used as a finishing sander by running with the wood grain! NOT a RANDOM ORBIT!
1605111
Its rounded. I use it up against a flat wall since I dont like how it doesnt quite fit right in a corner.
735435
Either add spin, or if you want to keep it flat, move the ball machine further back
1511499
It can go straight or pivot/rotate... There is a latch next to the wheel to do that.
666215
Yes, the front wheels do pivot, which is a great improvement over non-pivoting wheels. You can now turn corners without raising the front two wheels.
447539
This one is round. I believe there is an elongated version too. Double check the dementions.
2193465
The entire top portion will turn horizontal as well as vertical. It pivots on a ball mount. Hope this helps.
1488295
It is mostly straight. It can wiggle a little bit and steer but not a lot. Definitely not enough for corners.
699173
The one I purchased is round, not oval, but I use it a lot and like it very much.
1495490
No, it has a curve to it. I still use a house ball from the bowling alley for a straight ball. I just look the number up everytime.
190078
I'm pretty sure it does both. I know for sure it pivots side to side but can't remember if it pivots up and down.
1356420
It has two solid surfaces with ball bearings between them. It rotates very smoothly, yet the surface provides stability by staying in place as you swivel it.
2160977
I bought this as a gift, but from what I remember the bottom was flat. You may want to ask someone else to make sure.