Atch_05,_Specifications_of_Force_Adater_Kit_and_accessories.pdf

Minimal Specifications

Purchase of Force Machine Accessories/Adaptors The US Army Test Measurement and Diagnostics Equipment wishes to upgrade and replace force adapters, clevis’, pins and sleeves, couplers, and tension rods used in force calibrations up to 60,000 pounds. Additional adapters are requested that require up to 100,000 where indicated. This equipment is used in the calibration of load cells, crane scales, and dynamometers from a variety of manufacturers.

The items that are described below have been analyzed for strength which we believe do not exceed 77KPSI at forces required. The material requested is 17-4PH H900 heat treated stainless steel that should withstand 185-200KPSI. Other materials such as 4140 or 4340 steel can be substituted if it meets the specifications within this document. All items are to be designed to meet a safety factor of at least

2. Items such as the clevis’ are left to the bidder to determine the most economical manufacturing vs strength, using thread requirements and capacity described. The thread fitment is to be class 2B (internal) and 2A (external) or tighter.

The machines that these items are used in have base 2 X 12P, 1.5 X 12P, 1 X 14P and 0.5 X 20P English threads found in the load cells and machine hardware. The adapters and couplers are to adapt to load cells with 5/8 (0.625) X 20P, 1.25 X 12P, 1.75 X 12P English threads. The tension rods requested go through a mounting hole of approximately 1.18 inches and 1.56 inches. Therefore the body size of 1.1 inch and 1.51 inch tension rods are required. The tension rods will be used with the described clevis’ and adapters and couplers to apply force in tension to items such as crane scales, dynamometers, and load cells. Pins are required to interface between the clevis’ and the crane scales and dynamometers.

The sleeves will be used to increase the diameter of the pins when required.

Sketches of the equipment are provided to better understand the description. The following is a list of required. The number of sets required is 11, with the exception of 5 sets of additional 1.5 inch tension rods. Comments or questions on these requirements are welcome. Changes to dimensions must be approved before purchase. Drawings shall be supplied with bid.

I. MALE to FEMALE THREAD ADAPTORS:

1. (1) Thread adaptor, 1 ¾-12P Male to 2”-12P Female, Maximum length: 7”, capacity: 100,000 lbf.

2. (1) Thread adaptor, 2-12P Male to 1 3/4”-12P Female, Maximum length: 7”, capacity: 100,000 lbf.

3. (1) Thread adaptor, 1 1/4-12P Male to 1 1/2-12P Female, Maximum length: 5.5”, capacity 50,000 lbf.

4. (1) Thread adaptor, 1 1/2-12P Male to 1 1/4”-12P Female, Maximum length: 5.5”, capacity 50,000 lbf.

5. (1) Thread adaptor, 5/8-18P Male to 1-14P Female, Maximum length: 5.5”, capacity 10,000 lbf.

6. (1) Thread adaptor, 1 -14P Male to 5/8-18P Female, Maximum length: 5.5”, capacity 10,000 lbf.

7. (1) Thread adaptor, 5/8-18P Male to 1/2-20P Female, Maximum length: 4”, capacity 5,000 lbf.

8. (1) Thread adaptor, 1/2-20P Male to 5/8-18P Female, Maximum length: 4”, capacity 5,000 lbf.

9. (2) Thread adaptors, 2-12P Male to 1 1/2-12P Female, Maximum length: 5”, capacity 60,000 lbf for adapting the clevis’ with 2 inch threads to the 1.5 inch tension rods.

10. (2) Thread adaptors, 2 X 12P Male to 1-12P Female, Maximum length: 5”, capacity 60,000 lbf for adapting the clevis’ with 2 inch threads to the 1 inch tension rods.

The number provided of each of the items above is 11. (i.e. 11 of the number 1 through 8 adapters, 22 of the number 9 and 10 adapters).

Note the diameter of the outside of the female end of the adapter is not specified and must be analyzed for strength. Only the inside female thread is specified.

II. FEMALE COUPLERS:

1. (1) Coupler, 1 3/4-12P Female to 1 3/4 -12P Female, length Min. 4”, Max. 5”, capacity: 100,000 lbf.

Only 1 coupler is required since no 1 3/4 tension rod is supplied.

2. (1) Coupler, 1 1/4-12P Female to 1 1/4-12P Female, length Min. 3”, Max. 4”, capacity: 60,000 lbf.

Only 1 coupler is required since no 1 1/4 tension rod is supplied.

3. (2) Couplers, 1 1/2-12P Female to 1 1/2-12P Female, length Min. 3.5”, Max. 4”, outside diameter

2.5 inches minimum, capacity: 60,000 lbf. Reason for 2 is that these would be the upper and lower fasteners for the 1.5 inch tension rods.

4. (2) Couplers, 1-14P Female to 1-14P Female, length Min. 2.5”, Max. 3”, outside diameter 2.5 inches minimum, capacity: 60,000 lbf. Reason for 2 is that these would be the upper and lower fasteners for the 1 inch tension rods.

5. (2) Coupler, 5/8-18 Female to 5/8-18 Female, length Min. 2”, Max. 3”, capacity: 10,000 lbf. Reason for 2 is that these would be the upper and lower fasteners for the 5/8 inch tension rods.

The number provided of each of the items above is 11. (i.e. 11 of the number 1 and 2 couplers, 22 of the number 3, 4 and 5 couplers).

III. CLEVIS FIXTURES WITH PINS AND SLEEVES:

1. Clevis’ for 60,000 lbf capacity. Each pair of Clevis’ (top and bottom) are for testing dynamometers and Crane scales. Each clevis will have 2-12P Female Threads, 1.76” pin crosshole, 2.51” slot width.

The distance from inside web to pin cross hole is required to be 2 inches. 2 pairs of pins to be used with this set of clevis’ will be supplied with a diameter of 1.5” and 1.75”. Since the overall width of the clevis’ are based upon the design to meet the strength, the pin length will protrude from each side of the clevis by ½ inch to 1 inch. A pair of sleeves are to be supplied that slip on the 1.5 inch pins to provide a 2 inch diameter for scale testing. Sleeve dimensions are the following: 1.51” inside with 2” outside. The length of each of these sleeves is 2.375 inches. The clevis can be made from round or square stock as long as they are meet the stresses for a capacity of 60,000 lbf with a minimum safety factor of 2. The number of pairs of clevis, 2 pairs of pins, and pair of sleeves with this capacity is 11.

2. Clevis’ for 10,000 lbf capacity. Each pair of Clevis’ (top and bottom) are for testing dynamometers and Crane scales. Each clevis will have 1-14P Female Threads, 1.51” pin crosshole, 2.01” slot width.

The distance from inside web to pin cross hole is required to be 1.5 inches. 2 pairs of additional pins to be used with this set of clevis’ will be supplied with a diameter of 1.0” and 0.5”. Since the overall width of the clevis’ are based upon the design to meet the strength, the pin length will protrude from each side of the clevis by ½ inch to 1 inch. A pair of sleeves are to be supplied that slip on the 0.5 inch pins to provide a 0.75 inch diameter for scale testing. Sleeve dimensions are the following: 0.051” inside with 0.75” outside. The length of each of these sleeves is 1.875 inches.

The clevis can be made from round or square stock as long as they are meet the stresses for a capacity of 10,000 lbf with a minimum safety factor of 2. The number of pairs of clevis, 2 pairs of pins, and pair of sleeves with this capacity is 11.

Notes: The 1.5 inch pins maybe used in the 60,000 lbf clevis’ or the 10,000 lbf clevis’. Filet cuts are to be employed to reduce stress risers.

III. 17-4PH H900 STAINLESS STEEL TENSION RODs (11 sets):

1. A pair of 1 inch diameter tension rods with a capacity of 60,000 lbf. The body of the tension rod is not to exceed 1.1 inches and the threads on both ends is to be 1-14P with a length of 1.5 inches. Overall length is 8 inches.

2. A pair of 0.625 inch diameter tension rods with a capacity of 10,000 lbf. The body of the tension rod is not to exceed 1.1 inches and the threads on both ends is to be 5/8-18P with a length of 1.5 inches.

Overall length is 8 inches.

3. A pair of 0.5 inch diameter tension rods with a capacity of 5,000 lbf. The body of the tension rod is not to exceed 1.1 inches and the threads on both ends is to be 5/8-18P with a length of 1.5 inches.

Overall length is 8 inches.

Note: The couplers supplied above will be used as the fasteners in use. Combination of adapters, clevis’ and couplers will be used for multiple of applications. The diameter of the

IV. 17-4PH H900 STAINLESS STEEL TENSION RODs (5 sets):

1. A pair of 1.5 inch diameter tension rods with a capacity of 60,000 lbf. The body of the tension rod is not to exceed 1.51 inches and the threads on both ends is to be 1.5-12P with a length of 2 inches.

Overall length is 8 inches.

Note: The couplers supplied above will be used as the fasteners in use. Combination of adapters, clevis’ and couplers will be used for multiple of applications. The body diameter is 1.51 to fill the hole of the machine the tension rod is used with.

Attached are sketches to assist in designs.