Tolerances

A Precise Inside Diameter without Expensive and Time-Consuming Honing

Amalga Composites’ precision tooling provides the close-tolerance pressure tubing you demand. Our cylinder tubing features the following inside diameter characteristics to improve piston performance.

INSIDE DIAMETER SIZE RANGE – (All in inches)

TOLERANCE

Greater than 1.00 to 3.25

Plus .005 minus .000

Greater than 3.25 to 6.00

Plus .006 minus .000

Greater than 6.00 to 8.00

Plus .008 minus .000

Greater than 8.00 to 10.00

Plus .010 minus .000

Greater than 10.00 to 14.00

Plus .015 minus .000

Greater than 14.00 to 20.00

Plus .020 minus .000

Greater than 20.00 to 30.00

Plus .025 minus .000

Micro-inch bore finish: 15 Ra
Straightness: .001 per foot
Circularity: 0.002 Inches
Cylindricity: 0.002 Inches

Machining to Blueprint Specifications

Outside-diameter grinding

Amalga Composites uses centerless grinding as the standard finishing process for outside diameters.

 

Closer tolerances are

available upon request.

OUTSIDE DIAMETER SIZE RANGE – (All in inches)
TOLERANCE
Greater than 1.00 to 2.50
Plus .006 minus .000
Greater than 2.50 to 5.25
Plus .010 minus .000
Greater than 5.25 to 8.25
Plus .012 minus .000
Greater than 8.25 to 14.50
Plus .025 minus .005
Greater than 14.50 to 20.50
Plus .030 minus .010
Greater than 20.50 to 32.00
Plus .040 minus .010
Surface Finish: 125 Ra
Circularity: 0.010
Concentricity: 0.010
Concentricity: 0.010

Cutting

Composite tubing produced by Amalga Composites can be cut to blueprint-specified lengths using a horizontal stroke or abrasive cut-off saw (depending on the diameter).

 

Chamfers, Shoulders and Grooves

Amalga Composites offers cylinder bodies that are completely machined and ready for assembly.