Buttress Casing Form Gauges

Three Dial and Single Dial Gauges

The Three Dial and Single Dial gauges are convenient working gauges for controlling the basic thread form on API buttress casing. Their main role as a quick check of thread angles and tooth width during production help to control the manufacturing process and to evaluate incorrect or worn tooling.

1221

Gauge Type: External Three-Dial Gauge
Thread Type: API External Buttress Casing 4 Ω~20″
Dial Type: 0-15-0, Balanced
Graduation: 0.0005″
Dial Travel: 1/8″

Description: The 1221 Three Dial Gauge is used to check the thread form of API External Buttress Casing from 4-1/2~20″. Possible problems that may arise in the thread flanks and tooth width are determined through readings of the three separate dials. Indicator #1 contacts and measures the 10 Degree flank, while Indicators #2 & #3 contact and measure the straight portion of the 3 Degree flank. When used in conjunction with the specific Buttress Segment, incorrect flank angle, flank shave and improper tooth width can be verified. The use of a #1231-D Segment Base is required to properly “zero” your gauge. This gauge is used to determine the discrepancies in the thread form that may require further investigation with the #3285 Allen Portable Optical Comparator.

More Info About External Specs

1222

Gauge Type: Internal Three-Dial Gauge
Thread Type: Internal Buttress Casing 4-Ω~20″
Dial Type: 0-15-0, Balanced
Graduation: 0.0005″
Dial Travel: 1/8″

Description: The 1222 Three Dial Gauge is used to check the thread form of API Internal Buttress Casing from 4-1/2~20″. Possible problems that may arise in the thread flanks and tooth width are determined through readings of the three separate dials. Indicator #1 contacts and measures the 10 Degree flank, while Indicators #2 & #3 contact and measure the straight portion of the 3 Degree flank. When used in conjunction with the specific Buttress Segment, incorrect flank angle, flank shave and improper tooth width can be verified. The use of a #1232-D Segment Base is required to properly “zero” your gauge. This gauge is used to determine the discrepancies in the thread form that may require further investigation with the #3285 Allen Portable Optical Comparator in conjunction with castings of the thread form.

More Info About Internal Specs

1227

Gauge Type: Single Dial Buttress Form Gauge
Thread Type: Buttress Casing 4-Ω~13 3/8″
Dial Type: 0~5~0, Balanced
Graduation: 0.0005″
Dial Travel: 0.020″

Description: The 1227 is a thread form gauge used to check the tooth thickness of either External or Internal API Buttress Casing in sizes from 4-Ω~13 3/8″. It utilizes an anvil with a fixed pin locator on the 10 Degree flank while the moveable point contacts pitch line of the 3 Degree flank for accurate readings. Product error is determined by first and “zeroing” the indicator on a setting standard. Due to the differences in thread form, a 1225-A Setting Standard is required for External threads and a 1224-A is needed for Internal threads. The measurement taken then indicates the deviation from the API Nominal.

1228

Gauge Type: Single Dial Buttress Form Gauge
Thread Type: Buttress Casing 16~20″
Dial Type: 0~5~0, Balanced
Graduation: 0.0005″
Dial Travel: 0.020″

Description: The 1228 is a thread form gauge used to check the tooth thickness of either External or Internal API Buttress Casing in sizes from 16~20″. It utilizes an anvil with a fixed pin locator on the 10 Degree flank while the moveable point contacts pitch line of the 3 Degree flank for accurate readings. Product error is determined by first and “zeroing” the indicator on a setting standard. Due to the differences in thread form, a 1225-B Setting Standard is required for External threads and a 1224-B is needed for Internal threads. The measurement taken then indicates the deviation from the API Nominal.

1221M

Gauge Type: External Three Dial Gauge, Metric
Thread Type: API External Buttress Casing 114~508mm
Dial Type: 0~50~0, Balanced w/ Revolution Counting Hand
Graduation: 0.01mm
Dial Travel: 3mm

Description: The 1221M Three Dial Gauge is used to check the thread form of API External Buttress Casing from 114~508mm. Possible problems that may arise in the thread flanks and tooth width are determined through readings of the three separate dials. Indicator #1 contacts and measures the 10 Degree flank, while Indicators #2 & #3 contact and measure the straight portion of the 3 Degree flank. When used in conjunction with the specific Buttress Segment, incorrect flank angle, flank shave and improper tooth width can be verified. The use of a #1231-D Segment Base is required to properly “zero” your gauge. This gauge is used to determine the discrepancies in the thread form that may require further investigation with the #3285 Allen Portable Optical Comparator.

More Info About External Specs

1222M

Gauge Type: Internal Three Dial Gauge, Metric
Thread Type: Internal Buttress Casing 114~508mm
Dial Type: 0~50~0, Balanced w/ Revolution Counting Hand
Graduation: 0.01mm
Dial Travel: 3mm

Description: The 1222M Three Dial Gauge is used to check the thread form of API Internal Buttress Casing from 114~508mm. Possible problems that may arise in the thread flanks and tooth width are determined through readings of the three separate dials. Indicator #1 contacts and measures the 10 Degree flank, while Indicators #2 & #3 contact and measure the straight portion of the 3 Degree flank. When used in conjunction with the specific Buttress Segment, incorrect flank angle, flank shave and improper tooth width can be verified. The use of a #1232-D Segment Base is required to properly “zero” your gauge. This gauge is used to determine the discrepancies in the thread form that may require further investigation with the #3285 Allen Portable Optical Comparator in conjunction with castings of the thread form.

Internal Specs

1227M

Gauge Type: Single Dial Buttress Form Gauge
Thread Type: Buttress Casing 114~339mm
Dial Type: 0~5~0, Balanced
Graduation: 0.01mm
Dial Travel: 0.5mm

Description: The 1227M is a thread form gauge used to check the tooth thickness of either External or Internal 114~339mm Buttress Casing Threads. The 1227M indicates product error so it must be used in conjunction with the proper Setting Standards. By first “zeroing” your 1227 on the setting standard, the product error is read on the dial. The measurement taken then indicates the deviation from the API Nominal. The 1227M utilizes an anvil with a fixed pin to steady the gauge on the 10 Degree flank while a truncated 0.087″ diameter Contact Point makes the contact for an accurate reading. The Setting Standards required for the 1227M are the 1224-A for Internal threads and the 1225-A for the External threads.

1228M

Gauge Type: Single Dial Buttress Form Gauge
Thread Type: Buttress Casing 406~508mm
Dial Type: 0~5~0, Balanced
Graduation: 0.01mm
Dial Travel: 0.5mm

Description: The 1228M is a thread form gauge used to check the tooth thickness of either External or Internal 406~508mm Buttress Casing Threads. The 1228M indicates product error so it must be used in conjunction with the proper Setting Standards. By first “zeroing” your 1228M on the setting standard, the product error is read on the dial. The measurement taken then indicates the deviation from the API Nominal. The 1228M utilizes an anvil with a fixed pin to steady the gauge on the 10 Degree flank while a truncated 2.20mm diameter Contact Point makes the contact for an accurate reading. The Setting Standards required for the 1228M are the 1224-B for Internal threads and the 1225-B for the External threads.


1231-D and 1231-D9

“External” Buttress Base and Segments for Threads

More Info About External Specs


1232-D and 1232-D7

“Internal” Buttress Base and Segments for Threads

More Info About Internal Specs

Groove Width Gauges

Groove Width Gauges are used to check API buttress casing threads. Each gauge consists of two Tungsten carbide balls preset to specific parameters using the 1233-C template. Determination of proper groove width is then made on a go/no-go basis.


1251-A for external sizes up to 7-5/8″
1251-B for external sizes 8-5/8″ through 13-3/8″


1252 for all internal sizes

Groove Width Set Piece

1233-C is used to set the contact depth of the
groove gauges.

Profile Gauges: Hardened and precision ground for each of the 17 different forms covered in API Std. 5B and Spec. 7 plus 3 H-90 forms. Useful in identifying threaded connections, they also help detect stretched threads, thick first threads and rolled over threads. In some cases, one profile gauge will check several different connections.

Allen Gauge and Tool Company

421 North Braddock Avenue
Pittsburgh, PA 15208

P.O. Box 8647
Pittsburgh, PA 15221

Phone: 412.241.6410
Fax: 412.242.8877