Guide to Stemless Casters

Finding a Caster to fit the Built-in stem on your chair

Does your chair have the caster stems welded or built-in? Now one of the casters has broken and need replaced. Finding a replacement caster to fit the stem may be difficult. The caster-end of the stem can differ significantly from one model to the next and from one manufacturer to the next.

First try contacting the furniture dealer or the manufacturer to see if they can provide a replacement caster. If not, then obtain accurate measurements of the stem (the portion that would fit into the caster). Calipers are best to get accurate measurements however for other methods, visit our page with Tips for Measuring Stem Diameter. .

Compare your dimensions to those in the table. Then follow the link of the stem class (such as NA01) with dimensions that are closest to yours to see what stemless casters are available that have the best chance of fitting your stem.

	Stem NA01	Stem NA02	Stem NA03
	Stem NA04	Stem NA06	Stem NA07

Stemless Caster Choices: Using the graphic above for reference, measure the dimensions of your built-in stem and select the best match by **clicking the link in the column heading** for the stemless casters with the best chance of fitting your stem.
Feature	Series NA01	Series NA02	Series NA03	Series NA04	Series NA06	Series NA07
Shaft Diameter (Dimension A in diagram)	5/16"	3/8"	3/8"	7/16"	7/16"	7/16"
Total Length (Dim F)	1-1/4"	1-3/4"	1-1/8"	1-5/8"	2-1/8"	2-3/4"

The stemless caster will need to be completely seated on the stem to operate correctly: retained yet swiveling freely. With the stem built into the chair, the caster must be tapped to seat it onto the stem. This must be done carefully so as not to harm the caster. For a twin-wheel caster place a small board, 3/8" or 1/2" thick, between the wheels against the base of the caster. Firmly tap the wood, forcing the caster fully onto the stem. For a ball caster, use a rubber mallet or some material to protect the caster.

Stemless Casters Disclaimer

Finding stemless casters to fit your built-in stems takes careful measurement and a certain amount of luck. Even with Apollo Caster's telephone support, we cannot do the measuring and cannot guarantee that the measurements provided to us are correct. Even when the measurements are correct, the engineering of the built-in stem may be incompatible with the internal engineering of the caster, preventing it from working properly. Therefore, shipping costs for returns of stemless casters are paid by the customer. Restock charges will also apply (see more information at our Shipping and Returns Info page). Thank you for understanding.

Still need help? Email your stem dimensions to sales@apollocaster.com. Make sure to include your name and contact information. We'll try to reply within 24 hours.

Medical And Institutional

Restaurant & Food Service

Furniture

Industrial

Bellman Cart Casters

Pneumatic & Flat Free

Ergonomic

Retail Displays

Gaming & Hospitality

Heavy Duty Casters

Caster; Swivel; 6" x 2"; Crowned Duc Steel; Plate (4-1/2"x6-1/4"; holes: 2-7/16"x4-15/16" slotted to 3-3/8"x5-1/4"); Roller Brng; 2000#; Kingpinless; Pos Lok (Item #63164)

Caster; Swivel; 6"x2"; PolyU (Crowned) on Cast; Plate (4-1/2"x6-1/4"; holes: 2-7/16"x4-15/16" slots to 3-3/8"x5-1/4"); Roller Brn; 1200#; Kingpinless; brake (Item #67421)

Caster; Swivel; 6" x 1-1/4"; Flat Free (No Air!) (Grey); Grip Ring (7/16" x 1-7/16"); Zinc; Ball Brng; 150#; Tread brake (Item #66476)

Stemless Casters

Specials

Caster; Swivel; 5" x 2"; Cast Iron; Plate (4"x4-1/2"; holes: 2-5/8"x3-5/8" slots to 3"x3"; 3/8" bolt); Zinc; Roller Brng; 1000#; Kingpinless (Item #64048)

Caster; Swivel; 6" x 2"; Phenolic; Plate (4-1/2"x6-1/4"; holes: 2-7/16"x4-15/16" slots to 3-3/8"x5-1/4"); Roller Brng; 1200#; Kingpinless; Pos Lok; Brake (Item #63161)

Caster; Swivel; 6" x 2"; Crowned Duc Steel; Plate (4-1/2"x6-1/4"; holes: 2-7/16"x4-15/16" slots to 3-3/8"x5-1/4"); Roller Brng; 2000#; Kngpnless; Pos Lok; Brake (Item #63163)

Caster; Swivel; 6" x 2"; Ergonomic PolyU on Alum; Plate (4"x4-1/2"; holes: 2-5/8"x3-5/8" slotted to 3"x3"; 3/8" bolt); Stainless Yoke; Prec Ball Brng; 1250# (Item #63822)

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