Modern BB guns usually have a smoothbore barrel with a 4.5 mm (0.177 in) caliber, and use steel balls that measure 4.3–4.4 mm (0.171–0.173 in) in diameter and 0.33–0.35 g (5.1–5.4 gr) in weight, usually zinc- or copper-plated for corrosion resistance.

What is a standard size BB?

Modern BB guns usually have a smoothbore barrel with a 4.5 mm (0.177 in) caliber, and use steel balls that measure 4.3–4.4 mm (0.171–0.173 in) in diameter and 0.33–0.35 g (5.1–5.4 gr) in weight, usually zinc- or copper-plated for corrosion resistance.

How do you size a BB?

To find out the size of bottom bracket needed, measure the inside of the bottom bracket shell in your frame, it will be 73mm, 70mm or 68mm. Some older frames may have Italian threaded bottom brackets, instead of the more modern English.

How tight should a press fit bottom bracket be?

About three quarters of an inch into the shell should be about right for most bottom bracket cups. 3 Check to see that you have the correct size circular drift for your press. Here you can see the reverse (inner) side of the cup and bearing (the black ring), with the step sided drift seated on the bearing lip.

What size is Airsoft BB?

Airsoft BBs are the little plastic balls or pellets fired out of airsoft guns. They are the airsoft gun’s ammunition. They come in 6mm or 8mm sizes (with 6mm being the standard and most widely used size), and the BBs weigh between 0.12g to 0.20g to 0.46g with many other weights in-between.

What is BB shell width?

The shell widths range in width from 68mm to 86mm. The cartridge bearings of the PF46 system use an adaptor of plastic or aluminum and are pressed into the bottom bracket shell. Bearing adaptors are made to fit different crank spindle diameters, such as 22/24mm, 24mm, 28.99mm, and 30mm.

How do you measure crank spindle length?

When measuring your spindle length for use with Wheels Mfg bottom brackets, measure overall spindle length from the inner face of one crank arm to the end of the spindle. Remove all crank spacers and wave washer if present.

What is the right press size for a BB gun?

PRESS FIT 30 C’dale BB30A 73mm C’dale PRESS FIT 30A 73mm BB Right PRESS FIT 30 79mm SMN PRESS FIT BB86 TREK BB90

What is a press fit bottom bracket?

This creates an interference fit, also known as a press fit. The bottom bracket is then held in by the pressure created by the interference. To see a review of the various standards, see Bottom Bracket Standards and Terminology. Many press fit bottom brackets are designed so a removal tool must be seated against the bearing.

What are the dimensions of a California Queen Size Bed?

A California queen size bed measures 60 inches wide by 84 inches long and is 4 inches longer than a standard queen. A California queen bed can be a good fit for people who are a little taller or drift down the bed while sleeping at night.

What are the dimensions of a BB386EVO 68mm BB30 press?

BOTTOM BRACKET COMPATIBILITY BB386EVO 68mm ENGLISH 1.37”x24T BB30 PRESS FIT 30 C’dale BB30A 73mm C’dale PRESS FIT 30A 73mm