If you need a solid 4-inch steel ball, the Vigorous Store, the unbranded chrome-steel listing, and BC Precision are the relevant options here. They are described as 101.6 mm chrome-steel balls, though the listings provide different levels of detail. The other two results are 4-inch ball valves, not solid balls; consider them only if you are shopping for a threaded plumbing valve.
| Product | Best suited for | Key detail |
|---|---|---|
| Vigorous Store Chrome Steel Ball | A buyer seeking a single polished ball | AISI 52100; listed weight is 9.5 lb |
| 4-Inch Hardened Chrome Steel Ball | Buyers prioritizing stated hardness and wear resistance | AISI 52100 |
| BC Precision G100 Ball | Precision-oriented industrial applications | G100 grade stated |
| DERNORD Ball Valve | Buyers seeking a 4-inch threaded valve | 304 stainless steel; locking device |
| 316 Stainless Ball Valve | Buyers seeking a 4-inch valve with a blue handle | 316 stainless steel; 1000 WOG stated |
Vigorous Store 4-Inch Chrome Steel Ball
This listing describes one 4-inch (101.6 mm) precision bearing ball made from AISI 52100 chrome steel. It also specifies a mirror-polished finish and a weight of 9.5 pounds per ball.
Best for: Buyers who want one large, polished steel ball and value a stated material and weight. It was selected because the listing directly identifies a solid 4-inch ball rather than a valve or another assembly.
Limitation: The supplied product details do not state a precision grade or specific dimensional tolerance. Confirm those requirements with the seller if close tolerances matter.
4-Inch Hardened Chrome Steel Ball
This listing includes one 4-inch (101.6 mm) ball made from AISI 52100 chrome steel. Its stated characteristics include high hardness, load capacity, wear resistance, and medium corrosion resistance.
Best for: Buyers comparing balls for applications where hardness and wear resistance are priorities. It was selected because its description identifies the material and calls out those performance characteristics.
Limitation: The listing details provided do not specify a precision grade, surface finish, or exact load rating. Do not assume a particular tolerance or operating capacity without verifying it.
BC Precision G100 Chrome Steel Ball
BC Precision describes this as a 4-inch solid chrome-steel ball made from AISI 52100 steel. The listing states G100 precision grade and identifies roundness and surface finish as product attributes.
Best for: Buyers who want a stated precision grade for bearing, mechanical, or industrial use. It was selected because G100 is specifically identified, making this listing easier to compare with other precision-grade options.
Limitation: The supplied details do not include a numerical tolerance or a separate surface-finish measurement. Check the manufacturer’s specifications if a project requires exact limits.
DERNORD 4-Inch Stainless Ball Valve
This is a 4-inch NPT ball valve, not a 4-inch solid steel ball. The product name identifies 304 stainless steel, full-port construction, WOG service, and a locking device.
Best for: Buyers whose search for “4-inch steel ball” actually means a large threaded ball valve. It was included because the supplied results contain it, but it is not a substitute for a bearing ball.
Limitation: Verify that the valve’s connection and service specifications suit the intended installation. The supplied details do not provide a specific pressure rating.
316 Stainless 4-Inch Ball Valve
This listing describes a full-port ball valve with female NPT threads, a blue vinyl handle, 316 stainless steel, and a stated 1000 WOG rating. It is a valve assembly, not a solid ball bearing.
Best for: Buyers comparing 4-inch threaded valves who want the listed 316 stainless-steel construction and 1000 WOG specification. It was selected as the second valve result, not as a solid-ball recommendation.
Limitation: Check connection dimensions and operating requirements before purchase. The listing’s valve specifications do not describe a separate 4-inch steel ball.
Buying Guide: How to Choose a 4-Inch Steel Ball
Do you need a solid ball or a ball valve?
A solid steel ball is a single spherical component; a ball valve is plumbing equipment that uses a ball inside a body to control flow. Confirm the product type before comparing materials or specifications. In these results, only the first three products are described as solid balls.
Which material and finish should you compare?
The solid-ball listings identify AISI 52100 chrome steel. Compare the stated surface finish, hardness, and corrosion resistance against the conditions of use. The Vigorous listing specifies a mirror-polished finish, while the other ball listings emphasize hardness, wear resistance, or precision grade.
Does precision grade matter?
For precision-oriented bearing or mechanical work, look for a stated grade and dimensional tolerance. BC Precision identifies G100; the other ball descriptions provided do not state a grade. Ask for dimensional and finish specifications when the application requires exact fit or movement.
What should valve buyers verify?
If you need a valve, compare the connection type, material, port style, and stated service rating. The DERNORD listing identifies 4-inch NPT and a locking device. The 316 listing identifies female NPT threads and 1000 WOG. Confirm suitability for your system rather than treating either as a solid ball.
Frequently Asked Questions
How large is a 4-inch steel ball in millimeters?
The listed diameter is 101.6 mm.
Which listed solid ball states a precision grade?
BC Precision identifies its 4-inch chrome steel ball as G100.
Are the stainless-steel ball valves solid steel balls?
No. They are valve assemblies, not standalone steel balls.
Which listing states a mirror-polished finish?
The Vigorous Store listing describes its AISI 52100 ball as mirror polished.
Are these products guaranteed to meet a particular tolerance?
The supplied product details do not establish a shared tolerance. Check the individual listing or request specifications before buying for precision-critical work.