Non-Productive Time in Turning Calculator

✖Basic Setup Time is the basic time required to load/unload the workpiece and position the tool for production for one component.ⓘ Basic Setup Time [t_s]			+10% -10%
✖The Number of Tools Used is the total number of tools used for manufacturing a batch of products.ⓘ Number of Tools Used [N_t]			+10% -10%
✖Setup Time Per Tool is defined as the amount of time taken in setting up the tool while machining.ⓘ Setup Time Per Tool [t_st]			+10% -10%
✖Batch Size is the count of similar kinds of products to be manufactured.ⓘ Batch Size [N_b]			+10% -10%
✖Loading And Unloading Time is the time required to load/unload the workpiece before the start of machine operation.ⓘ Loading And Unloading Time [t_ln]			+10% -10%
✖Tool Positioning Time Per Operation is defined as the time taken in changing the tool before the start of operation.ⓘ Tool Positioning Time Per Operation [t_pt]			+10% -10%
✖The Number of Operations is defined as the total number of operations done in a batch.ⓘ Number of Operations [n₀]			+10% -10%

✖Non-Productive Time (NPT) refers to the time during which a machine is not actively engaged in producing parts.ⓘ Non-Productive Time in Turning [NPT]

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Formula

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Non-Productive Time in Turning

Formula

`"NPT" = (("t"_{"s"}+"N"_{"t"}*"t"_{"st"})/"N"_{"b"})+"t"_{"ln"}+("t"_{"pt"}*"n"_{"0"})`

Example

`"28.16667min"=(("20.50min"+"4"*"10min")/"3")+"30s"+("1.50min"*"5")`

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Non-Productive Time in Turning Solution

STEP 0: Pre-Calculation Summary

Formula Used

Non-Productive Time = ((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)+Loading And Unloading Time+(Tool Positioning Time Per Operation*Number of Operations)
NPT = ((t_s+N_t*t_st)/N_b)+t_ln+(t_pt*n₀)
This formula uses 8 Variables

Variables Used

Non-Productive Time - (Measured in Second) - Non-Productive Time (NPT) refers to the time during which a machine is not actively engaged in producing parts.
Basic Setup Time - (Measured in Second) - Basic Setup Time is the basic time required to load/unload the workpiece and position the tool for production for one component.
Number of Tools Used - The Number of Tools Used is the total number of tools used for manufacturing a batch of products.
Setup Time Per Tool - (Measured in Second) - Setup Time Per Tool is defined as the amount of time taken in setting up the tool while machining.
Batch Size - Batch Size is the count of similar kinds of products to be manufactured.
Loading And Unloading Time - (Measured in Second) - Loading And Unloading Time is the time required to load/unload the workpiece before the start of machine operation.
Tool Positioning Time Per Operation - (Measured in Second) - Tool Positioning Time Per Operation is defined as the time taken in changing the tool before the start of operation.
Number of Operations - The Number of Operations is defined as the total number of operations done in a batch.

STEP 1: Convert Input(s) to Base Unit

Basic Setup Time: 20.5 Minute --> 1230 Second (Check conversion here)
Number of Tools Used: 4 --> No Conversion Required
Setup Time Per Tool: 10 Minute --> 600 Second (Check conversion here)
Batch Size: 3 --> No Conversion Required
Loading And Unloading Time: 30 Second --> 30 Second No Conversion Required
Tool Positioning Time Per Operation: 1.5 Minute --> 90 Second (Check conversion here)
Number of Operations: 5 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

NPT = ((t_s+N_t*t_st)/N_b)+t_ln+(t_pt*n₀) --> ((1230+4*600)/3)+30+(90*5)

Evaluating ... ...

NPT = 1690

STEP 3: Convert Result to Output's Unit

1690 Second -->28.1666666666667 Minute (Check conversion here)

FINAL ANSWER

28.1666666666667 ≈ 28.16667 Minute <-- Non-Productive Time

(Calculation completed in 00.004 seconds)

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Credits

Created by Parul Keshav

National Institute of Technology (NIT), Srinagar

Parul Keshav has created this Calculator and 300+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

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< 17 Turning Operation Calculators

Batch Size given Non-productive Time in Turning

Go Batch Size = (Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/((Non-Productive Time-Loading And Unloading Time-(Tool Positioning Time Per Operation*Number of Operations)))

Tool Positioning Time per Operation given Non-Productive Time in Turning

Go Tool Positioning Time Per Operation = (Non-Productive Time-((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)-Loading And Unloading Time)/Number of Operations

Loading and Unloading Time given Non-productive Time in Turning

Go Loading And Unloading Time = Non-Productive Time-((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)-(Tool Positioning Time Per Operation*Number of Operations)

Set-up Time per Tool Terms of Non-Productive Time in Turning

Go Setup Time Per Tool = ((Non-Productive Time-Loading And Unloading Time-(Tool Positioning Time Per Operation*Number of Operations))*Batch Size-Basic Setup Time)/Number of Tools Used

Number of Operations given Non-productive Time in Turning

Go Number of Operations = (Non-Productive Time-((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)-Loading And Unloading Time)/Tool Positioning Time Per Operation

Basic Setup time given Non-productive Time in Turning

Go Basic Setup Time = (Non-Productive Time-Loading And Unloading Time-(Tool Positioning Time Per Operation*Number of Operations))*Batch Size-(Number of Tools Used*Setup Time Per Tool)

Number of Tools given Non-Productive Time in Turning

Go Number of Tools Used = ((Non-Productive Time-Loading And Unloading Time-(Tool Positioning Time Per Operation*Number of Operations))*Batch Size-Basic Setup Time)/Setup Time Per Tool

Non-Productive Time in Turning

Go Non-Productive Time = ((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)+Loading And Unloading Time+(Tool Positioning Time Per Operation*Number of Operations)

Diameter of Workpiece given Constant for Cylindrical Turning

Go Diameter of Workpiece = Constant For Machining Condition*Feed/(pi*Length of Cut)

Turning Length given Constant for Cylindrical Turning

Go Length of Cut = Constant For Machining Condition*Feed/(pi*Diameter of Workpiece)

Feed given Constant for Cylindrical Turning

Go Feed = pi*Diameter of Workpiece*Length of Cut/Constant For Machining Condition

Constant for given Cylindrical Turning

Go Constant For Machining Condition = pi*Diameter of Workpiece*Length of Cut/Feed

Length of Cut using Machining Time

Go Length of Cut in Machining = Feed Rate*Machining Time in Machining*Rotational Frequency of Workpiece

Feed Rate for Turning Operation given Machining Time

Go Feed Rate = Length of Cut/(Turning Time*Angular Velocity of Job or Workpiece)

Machining Time for Turning Operation

Go Turning Time = Length of Cut/(Feed Rate*Angular Velocity of Job or Workpiece)

Diameter of Turned Parts given Length-to-Diameter Ratio

Go Diameter of Workpiece = (1.67/Length to Diameter Ratio)^(1/0.68)

Length-to-diameter Ratio given diameter of turned parts

Go Length to Diameter Ratio = 1.67/(Diameter of Workpiece^0.68)

Non-Productive Time in Turning Formula

What is the difference between turning and facing operations?

In the turning operation, the tool generally reduces the diameter of the cylindrical workpiece, which can be done by cutting into the part for some depth and move the tool parallel to the axis of the part. While facing operation reduces the length of the piece, the tool is moved perpendicular to the axis of the part.

How to Calculate Non-Productive Time in Turning?

Non-Productive Time in Turning calculator uses Non-Productive Time = ((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)+Loading And Unloading Time+(Tool Positioning Time Per Operation*Number of Operations) to calculate the Non-Productive Time, The Non-Productive Time in Turning is the total time wasted in setting up the machine or workpiece for a particular process. Non-Productive Time is denoted by NPT symbol.

How to calculate Non-Productive Time in Turning using this online calculator? To use this online calculator for Non-Productive Time in Turning, enter Basic Setup Time (t_s), Number of Tools Used (N_t), Setup Time Per Tool (t_st), Batch Size (N_b), Loading And Unloading Time (t_ln), Tool Positioning Time Per Operation (t_pt) & Number of Operations (n₀) and hit the calculate button. Here is how the Non-Productive Time in Turning calculation can be explained with given input values -> 0.469444 = ((1230+4*600)/3)+30+(90*5).

FAQ

What is Non-Productive Time in Turning?

The Non-Productive Time in Turning is the total time wasted in setting up the machine or workpiece for a particular process and is represented as NPT = ((t_s+N_t*t_st)/N_b)+t_ln+(t_pt*n₀) or Non-Productive Time = ((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)+Loading And Unloading Time+(Tool Positioning Time Per Operation*Number of Operations). Basic Setup Time is the basic time required to load/unload the workpiece and position the tool for production for one component, The Number of Tools Used is the total number of tools used for manufacturing a batch of products, Setup Time Per Tool is defined as the amount of time taken in setting up the tool while machining, Batch Size is the count of similar kinds of products to be manufactured, Loading And Unloading Time is the time required to load/unload the workpiece before the start of machine operation, Tool Positioning Time Per Operation is defined as the time taken in changing the tool before the start of operation & The Number of Operations is defined as the total number of operations done in a batch.

How to calculate Non-Productive Time in Turning?

The Non-Productive Time in Turning is the total time wasted in setting up the machine or workpiece for a particular process is calculated using Non-Productive Time = ((Basic Setup Time+Number of Tools Used*Setup Time Per Tool)/Batch Size)+Loading And Unloading Time+(Tool Positioning Time Per Operation*Number of Operations). To calculate Non-Productive Time in Turning, you need Basic Setup Time (t_s), Number of Tools Used (N_t), Setup Time Per Tool (t_st), Batch Size (N_b), Loading And Unloading Time (t_ln), Tool Positioning Time Per Operation (t_pt) & Number of Operations (n₀). With our tool, you need to enter the respective value for Basic Setup Time, Number of Tools Used, Setup Time Per Tool, Batch Size, Loading And Unloading Time, Tool Positioning Time Per Operation & Number of Operations 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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