MEDIDOR DE PASO DE CUERDAS API.pdf

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LG-5002Lead Gage

OPERATION MANUAL



L L e e a a d d G G a a g g e e O O p p e e r r a a t t i i o o n n M M a a n n u u a a l l M M o o d d e e l l L L G G - - 5 5 0 0 0 0 2 2

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©2008 Gagemaker, LP

OMLG50035-01




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Contents

Introduction

Technical Support 7Product Information and Updates 7

System ComponentsComponent List 9

Setup Procedures

Setting Up the Lead Gage 11Zeroing the Lead Gage 14

Operating Procedures

Inspecting Parts 17

Care and Maintenance

Replacing the Indicator 19Maintenance Tips 21Warranty Information 21




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Congratulations! Your decision to purchase a Gagemaker product above all others on the marketdemonstrates your confidence in our quality and workmanship.

To ensure the high performance and operation of our product, we urge you to use the included referencematerials. They contain important information for proper setup and use of the equipment. Also, werecommend that you follow the care and maintenance tips in this manual to keep the equipment workingin top condition.

If your questions have not been addressed in our reference materials, contact your localrepresentative or a customer service representative at 713-472-7360.




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Introduction

The lead gage inspects both internal and external thread lead using contact points that seat in thethreads of a part. Thread lead is the distance between threads, measured on a plane parallel to thecenterline of the threaded part. The pitch of the thread determines the diameter of the contact pointsrequired for taking measurements (refer to the tables for ACME, Stub ACME, UN and API Threads inthe Setup Procedures section of this manual).

Gagemaker’s lead gage, Model LG-5002, uses two contact points to inspect thread lead. One fixedcontact point at the rear of the gage and one moveable contact point at the front of the gage providecomplete stability when taking thread lead measurements.

Before inspecting parts, the lead gage must be preset to a nominal predetermined dimension, using alead gage setting standard. These setting standards are manufactured according to ANSI and APIspecifications with grooves ground at precise increments. The increments are normally set at ¼”intervals from 1” – 4”. Lead standards are available for ACME, Stub ACME, UN and API threads (referto the table in the procedure for Zeroing the Lead Gage in this manual).

To inspect parts, seat the rear contact point of the gage into the thread of the part. Then, seat the

moveable contact point at the front of the gage in the thread. Apply pressure to the nose of the gagewith an index finger and sweep from side to side to get an indicator reading. It is recommended that thegage be zeroed periodically during use to maintain accurate readings.

Technical Support

Phone: 713-472-7360Hours: Monday – Friday 8AM – 5PM (CST)

Product Information and Updates

Visit our web site at: www.gagemaker.com




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System Components

Take some time to become familiar with all the parts that make up the lead gage by reviewing thelabeled diagram below. The part names are important for understanding the operatinginstructions.

Component List

Item Descrip tion Qty Item Description Qty

1 Main Body 1 9 Moving Contact Point Assembly 1

2 Adjustment Knob 1 10 Fixed Contact Point Bar 1

3 Indicator Assembly 1 11 Bushings 2

4 Clamp Screw 1 12 Indicator Push Rod 1

5 Thru hole Clamp 1 13 Indicator Push Rod Sleeve 1

6 Threaded Clamp 4 14 Indicator Hold Down Screws 4

7 Back Yoke 1 15 Yoke Hold Down Screws 2

8 Front Yoke 1 16 Contact Point Assembly Hold Down Screws 2

1614

9 13 12 11

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87 6

5 10

42 1

3




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Setup Procedures

Setting Up the Lead Gage

Materials Needed:

• Lead gage • Calipers

• Contact points (2) • Paper clip

Setting up the lead gage, involves installing the proper size contact points for the application (refer to thetable below for selecting the proper model contact point for ACME, Stub ACME, UN threads or APIthreads).

ACME or Stub ACME Threads UN Threads

Thread Pitch Contact Point Model No. Thread Pitch Contact Point Model No.

1 pitch T531T 1 pitch T562

1.5 pitch T344T 2 pitch T288


2.5 pitch T219T 3.5 pitch T188

3 pitch T188T 4 pitch T1443.5 pitch T144T 4.5 pitch T128


5 pitch T105T 5.5 pitch T105

6, 7 pitch T090T 6 pitch T096






18 pitch T032

API Threads

Connection Type

PointDiameter

Thread PitchContact PointModel Number

Hughes Slim Line H-90 0.235” 3 T235

All Hughes H-90 0.200” 3 ½ T200

API Rotary Shouldered Connections 0.144” 4 T144

API Rotary Shouldered Connections 0.128” 4 ½ T128

API Rotary Shouldered Connections 0.115” 5 T115

Truncated for Extreme Line 0.105” 5 ½ T105T

API Rotary Shouldered Connections 0.096” 6 T096API Tubing, Casing and Line Pipe 0.072” 8 T072

Buttress Casing - Lead 0.062” 5 T062

API Tubing and Line Pipe 0.057” 10 T057

API Line Pipe 0.050” 11 ½ T050

API Line Pipe 0.041” 14 T041






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Setting Up the Lead Gage (continued)

1. Determine the size of contact points to be

used, by the pitch of the thread being

inspected.

2. Using calipers, verify the size of the contact

point.

3. Install one contact point into the moveable

point holder at the front of the gage.

4. Determine the location for the other contact

point based on the interval of lead required for

the inspection. The increments in the lead

gage are set at ¼” intervals from 1” – 4”.

5. Install the remaining contact point into theproper hole.




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Setting Up the Lead Gage (continued)

6. Once installed, insert a paper clip into the hole

in each contact point and tighten.




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Zeroing the Lead Gage

Materials Needed:

• Lead gage • Lead gage standard

The lead gage performs a comparative inspection between a fixed standard and the threaded part.

Before applying the gage to a part, you must zero the lead gage on the proper standard. Based on thetype of connection being inspected, locate the proper lead gage standard in the table below to ensure

consistent and accurate readings. The lead gage should be zeroed on a standard once during each shift,

at a minimum.

Connection TypeTaper (in/ft)

Threadsper Inch

Lead GageStandard Model

Number

8 & 10 Round Tubing / Casing ¾ 8 & 10 LS-1001

8 & 10 V Form Tubing (straight) 0 8 & 10 LS-1002

Line Pipe Tubing / Casing ¾ 11½ LS-1003Line Pipe (straight) 0 11½ LS-1004

13⅜” & smaller Buttress Casing ¾ 5 LS-1005

16” & larger Buttress Casing 1 5 LS-1006

6⅝ API Reg4”, 5½” - 6⅝” FH2⅜” - 5½” IF2⅞” - 5” XHNC23 – NC50

2 4 LS-1007

5½” Reg7⅝” - 8⅝” RegNC56 – NC77

3 4 LS-1008

2⅜” - 4 ½” Reg2⅞” - 3 ½”, 4½” FH

3 5 LS-1009

2⅜” Open Hole 1½ 4 LS-1010

3½” - 6⅝” H-90 2 3½ LS-1011

7” - 8⅝” H-90 3 3½ LS-1012

2⅜” - 3½” Slimline H-90 1¼ 3 LS-1013




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Zeroing the Lead Gage (continued)

1. Place the fixed contact point in the first grooveof the standard.

2. Slide the gage over until the fixed contact

point seats against the fence.

3. Place the moveable contact point into the

groove of the setting standard.

Note: For Non-vee threads, pull the lead gage

toward the load flank of the groove in the

standard. For Vee threads, be sure the

contact points touch both flanks of the

groove in the standard.

4. As the moveable contact point touches thestandard, slide the front of the lead gage to

the left until the contact point seats against the

fence.




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Zeroing the Lead Gage (continued)

5. With the two contact points properly seated in

the grooves and against the fence of the

standard, turn the indicator dial to align the

needle with zero.




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Operating Procedures

Inspecting Parts

Materials Needed:

• Lead gage • Inspection report

• Part

Inspecting parts using the lead gage involves placing the lead gage’s contact points in the flanks of the

thread to obtain a lead measurement. The two point system on the lead gage provides accurate

readings.

1. After zeroing the lead gage on the standard,

seat the rear contact point into the thread.

2. Tilt the gage forward to seat the moveable

contact point into the thread.

Wear Pad




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Inspecting Parts (continued)

3. Apply pressure to the nose of the gage with the

index finger. Do not apply excessive force to

the gage, just enough to keep the moveable

point in contact with the thread flanks. Then,

using the rear contact point as the pivot point,

sweep the gage for the measurement.

4. Record any deviations on an inspection or

calibration report.

5. Use the first part you inspected as a control

piece to verify repeatability. Mark the part at the

location where it was inspected and record the

deviation from zero.

6. During the inspection process, periodically

place the lead gage on the control piece toverify the gage’s repeatability.




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Care and Maintenance

Replacing the Indicator

Materials Needed:

• Lead gage • Lead gage standard

• Indicator with extension and point installed. • Small jewelers Phillips head screwdriver

1. Using a small jewelers Phillips head

screwdriver, remove the four screws from the

back of the gage.

2. Unscrew and remove the bezel clamp screw

and remove the screw and bezel clamp.

3. Slide the indicator assembly out of the gage

body.




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Replacing the Indicator (continued)

4. Slide the new indicator assembly with pointlever attached back into the body of the lead

gage.

5. Replace the bezel clamp and clamp screw.

6. Replace the four Phillips head screws into the

back of the gage body into the indicator.




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Maintenance Tips

• Keep all unprotected metal surfaces coated with light oil.

• Avoid dropping the gage or subjecting it to any vibration or impact.

• Keep the gage dry and away from any machine coolant spray.

• Do not force the movement of any of the mechanical parts. The mechanics are designed to movefreely.

• Keep the indicator face clean.

Warranty Information

GAGEMAKER warrants its products to be free from defects in material and workmanship for one yearfrom the date of shipment. At our option, we will repair or replace any defective product upon return,prepaid, properly packed to our factory in Pasadena, Texas. This warranty applies to all products whenused in a normal industrial environment. Any unauthorized tampering, misuse or neglect will make this

warranty null and void. Under no circumstances will GAGEMAKER or any affiliate have any liabilities forloss or for any indirect or consequential damages. The foregoing warranties are in lieu of all otherwarranties expressed or implied, including but not limited to, the implied warranties of merchantabilityand fitness for a particular purpose.




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NOTES:




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NOTES:



Gagemaker, LP, P.O. Box 87709, Houston, Texas 77287-7709712 East Southmore Ave., Pasadena, Texas 77502

Phone: 713-472-7360Fax: 713-472-7241

Web site: www.gagemaker.com

MEDIDOR DE PASO DE CUERDAS API.pdf

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