Internal Diameter of Stuffing Box Calculator

✖Diameter of Shaft is defined as the diameter of the hole in the iron laminations that contains the shaft.ⓘ Diameter of Shaft [d_shaft]			+10% -10%
✖Clearance between Shaft and Stuffing Box is based on the theory that most damage is done to shafts, during the late running of packings.ⓘ Clearance between Shaft and Stuffing Box [c]			+10% -10%

✖Internal Diameter Stuffing Box to determine the correct packing size, measure the diameter of the shaft (inside the stuffing box area if possible) and then measure the diameter of the stuffing box.ⓘ Internal Diameter of Stuffing Box [d_sb]

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Internal Diameter of Stuffing Box Solution

STEP 0: Pre-Calculation Summary

Formula Used

Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box
d_sb = d_shaft+2*c
This formula uses 3 Variables

Variables Used

Internal Diameter Stuffing Box - (Measured in Millimeter) - Internal Diameter Stuffing Box to determine the correct packing size, measure the diameter of the shaft (inside the stuffing box area if possible) and then measure the diameter of the stuffing box.
Diameter of Shaft - (Measured in Millimeter) - Diameter of Shaft is defined as the diameter of the hole in the iron laminations that contains the shaft.
Clearance between Shaft and Stuffing Box - (Measured in Millimeter) - Clearance between Shaft and Stuffing Box is based on the theory that most damage is done to shafts, during the late running of packings.

STEP 1: Convert Input(s) to Base Unit

Diameter of Shaft: 12 Millimeter --> 12 Millimeter No Conversion Required
Clearance between Shaft and Stuffing Box: 13 Millimeter --> 13 Millimeter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d_sb = d_shaft+2*c --> 12+2*13

Evaluating ... ...

d_sb = 38

STEP 3: Convert Result to Output's Unit

0.038 Meter -->38 Millimeter (Check conversion here)

FINAL ANSWER

38 Millimeter <-- Internal Diameter Stuffing Box

(Calculation completed in 00.004 seconds)

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Home » Engineering » Chemical Engineering » Process Equipment Design » Agitators » Design of Stuffing Box and Gland » Internal Diameter of Stuffing Box

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< Design of Stuffing Box and Gland Calculators

Thickness of Stuffing Box Body

LaTeX Go Thickness of Stuffing Box Body = (Design Pressure of Stuffing Box*Internal Diameter Stuffing Box)/(2*Allowable Stress for the Stuffing Box Material)+6

Internal Diameter of Stuffing Box

LaTeX Go Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box

Clearance between Shaft and Stuffing Box if Shaft Diameter is less than equal to 100mm

LaTeX Go Clearance between Shaft and Stuffing Box = 0.2*Diameter of Shaft+5

Thickness of Gland Flange

LaTeX Go Thickness of Gland Flange = (Diameter of Shaft/8)+12.5

Internal Diameter of Stuffing Box Formula

LaTeX Go

Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box
d_sb = d_shaft+2*c

What is Stuffing Box?

A stuffing box of a sailing boat will have a stern tube that is slightly bigger than the prop shaft. It will also have packing nut threads or a gland nut. The packing is inside the gland nut and creates the seal. The shaft is wrapped by the packing and put in the gland nut. Through tightening it onto the stern tube, the packing is compressed, creating a seal against the shaft. Creating a proper plunger alignment is critical for correct flow and a long wear life. Stuffing box components are of stainless steel, brass or other application-specific materials. Compression packing is rigorously tested to ensure effective sealing in valves, pumps, agitators, and other rotary equipment.

How to Calculate Internal Diameter of Stuffing Box?

Internal Diameter of Stuffing Box calculator uses Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box to calculate the Internal Diameter Stuffing Box, The Internal Diameter of Stuffing Box formula is defined as a measurement of the distance of a straight line from one point on the inner wall of the stuffing box, through its center, to an opposite point. The inside diameter is dependent on the shaft diameter of the stuffing box and its clearance between shaft and stuffing box. Internal Diameter Stuffing Box is denoted by d_sb symbol.

How to calculate Internal Diameter of Stuffing Box using this online calculator? To use this online calculator for Internal Diameter of Stuffing Box, enter Diameter of Shaft (d_shaft) & Clearance between Shaft and Stuffing Box (c) and hit the calculate button. Here is how the Internal Diameter of Stuffing Box calculation can be explained with given input values -> 38000 = 0.012+2*0.013.

FAQ

What is Internal Diameter of Stuffing Box?

The Internal Diameter of Stuffing Box formula is defined as a measurement of the distance of a straight line from one point on the inner wall of the stuffing box, through its center, to an opposite point. The inside diameter is dependent on the shaft diameter of the stuffing box and its clearance between shaft and stuffing box and is represented as d_sb = d_shaft+2*c or Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box. Diameter of Shaft is defined as the diameter of the hole in the iron laminations that contains the shaft & Clearance between Shaft and Stuffing Box is based on the theory that most damage is done to shafts, during the late running of packings.

How to calculate Internal Diameter of Stuffing Box?

The Internal Diameter of Stuffing Box formula is defined as a measurement of the distance of a straight line from one point on the inner wall of the stuffing box, through its center, to an opposite point. The inside diameter is dependent on the shaft diameter of the stuffing box and its clearance between shaft and stuffing box is calculated using Internal Diameter Stuffing Box = Diameter of Shaft+2*Clearance between Shaft and Stuffing Box. To calculate Internal Diameter of Stuffing Box, you need Diameter of Shaft (d_shaft) & Clearance between Shaft and Stuffing Box (c). With our tool, you need to enter the respective value for Diameter of Shaft & Clearance between Shaft and Stuffing Box and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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