"Pitch circle diameter" redirects here. For the effective distance between gears, see Pitch circle diameter (gears).
Drawing of 5-hole (left) and 4-hole (right) pitch circles
A bolt circle diameter or pitch circle diameter (PCD), sometimes simply called bolt circle or pitch circle, is a common term for when a number of screw holes for bolts are evenly distributed with their centers along an imaginary circle with a given diameter.
An example of use is mounting of car rims, where the bolt circle is one of several factors that determine whether a set of rims will fit a car. For example, a bolt circle of 5×130 or 5-130 indicates that a rim is to be attached to the car via 5 screws evenly spaced along a circle with a diameter of 130 millimeters.[1] Other common uses for bolt circles are for indicating mounting for sim racing and real-world car steering wheels, or in the industry for mounting of servomotors or for specifying the bolt pattern of a flange. Attachment of chain rings for bicycle cranksets are also specified by a bolt circle.[2]
^"Wheel Tech: Bolt Pattern".
^Wolf Tooth Tech Help - Measure Bike Chainring BCD Bolt Circle Diameter – Wolf Tooth Components
A boltcircle diameter or pitch circle diameter (PCD), sometimes simply called boltcircle or pitch circle, is a common term for when a number of screw...
hole circle is the circle that the center of each bolt aligns with. The second number in a bolt pattern is the diameter of this circle. The boltcircle has...
always use a single boltcircle diameter. Cranks designed to mount three chainrings will almost always use two different boltcircle diameters; the larger...
running off the rails). Flanges are often attached using bolts in the pattern of a boltcircle. Flanges play a pivotal role in piping systems by allowing...
Some designs (Audi, BMW, Mercedes-Benz, Saab, Volkswagen) use lug bolts or wheel bolts instead of nuts, which screw into a tapped (threaded) hole in the...
5 on 4.5" wheel boltcircle and the part-time 4WD models used a 5 on 5.5" boltcircle. 2WD models used the 5 on 4.5" wheel boltcircle, which was changed...
word "BASIC". BC or B.C. boltcircle BCD or B.C.D. boltcircle diameter BHC bolt hole circle Same definition as the boltcircle diameter BHCS button head...
desired value. For example, on a car's wheel, the lug nut holes define a boltcircle that is a datum from which the location of the rim can be defined and...
torque from a driving to a driven bolt or shaft tangentially on a common boltcircle. Torque is transmitted between the bolts through a series of thin, stainless...
Bolt thrust or breech pressure is a term used in internal ballistics and firearms (whether small arms or artillery) that describes the amount of rearward...
Chargers also used a 5-on-4.5" wheel boltcircle (still 7/16" studs), while the US cars did not go to "big bolt pattern" until 1973. The Charger was extraordinarily...
of credentials in psychology Buoyancy control device, in scuba diving Boltcircle diameter, for example, of a crankset, of a bicycle disc brake, or in...
lightning bolt and circle has given rise to many similar designs unrelated to the fascist flash and circle. These include the logo of BoltBus, which chose...
vehicles used the Mopar 5 × 4.5 boltcircle, this was the first Jeep following the 1987 Chrysler buyout to receive a wider bolt pattern—5 × 5. A notable feature...
the first Cadillacs to use the smaller GM wheel bolt pattern (5 lugs with a 4.75 in (121 mm) boltcircle; the 2003–2009 XLR also uses this pattern). The...
manufacturer testing demonstrated the EUV can hold more cargo. The turning circle of the Bolt EUV is 38.3 ft (11.7 m), measured wall-to-wall. The Super Cruise advanced...
Patriot. The Caliber wheels have a five-hole pattern with a 114.3 mm boltcircle. Three models were available at the Caliber's launch, with a fourth available...
torque from a driving to a driven bolt tangentially on a common boltcircle. Torque is transmitted between the bolts through a series of thin, stainless...
6×70 mm, which denotes a boltcircle pattern with six bolts placed along a circle 70 mm in diameter. Other examples of common bolt patterns are 3×1.75 in...
resistance Recommended Pilot Hole Sizes in Metal, Inch and Metric Recommended Pilot Hole Sizes in Wood SAE Standard J635 Fan Hub BoltCircles and Pilot Holes...
Tempest's 9 in (23 cm) brake drum, which used five studs on the same boltcircle ("five-on-four-and-a-half") and 15 in (38 cm) wheels - a configuration...
batteries were decommissioned, and the guns dismounted and scrapped. A boltcircle for a 15-inch dynamite gun remains near the southwest tip of Fisher's...
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