Question and Answers 1333ND25QNB680084.pdf
PDF 36 KB Posted
- Attached to
- Bronze Drive nuts
- Solicitation number
- 1333ND25QNB680084
About this file
This is a Questions and Answers document for solicitation 1333ND25QNB680084 regarding bronze drive nuts for the Department of Commerce National Institute of Standards and Technology (NIST).
The Q&A addresses technical specifications for four bronze drive nuts that interface with 10-foot screw sections in an existing machine. The document clarifies that while matching nuts to existing screws would typically be advisable, accessing the screws would require extensive machine teardown, so this is not feasible. Instead, NIST will provide one undamaged existing nut for comparison and prefers incorporating a test fit into the manufacturing process. The document also addresses the relationship between thread start position and gear teeth, recommending that all four nuts be manufactured identically in terms of how their start thread aligns with gear teeth, though no specific markings or requirements are indicated in the original drawings.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| CSS- 1333ND25QNB680084.pdf | ||
| Statement of work.pdf |
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
1333ND25QNB680084 Questions and Answers
Q1. Would it not make sense for the Contractor to have one of the screws to match to the nuts?
After 60 years there must be some wear on the screw(s), probably not uniform along the length.
Maybe even the (4) screws might need to be re-ground.
Yes, it would normally, but in this case, it is not possible as a massive teardown of the machine would be required to get the 10-foot screw sections out. We will definitely prefer a test fit built into the operation if necessary. Also, as stated in the SOW, we can supply one of the existing undamaged nuts for comparison to the awardee.
Q2. Regarding the "start" of the thread in relation to the gear teeth. Is there a position for this to be held? What is it? If so, must all (4) nuts be alike in this? Or do other adjustments in the mechanism make this immaterial?
Although I cannot see any markings on the originals or see anything called out in the drawings, it makes perfect sense to make all 4 identical in their relation to the start thread in relation to a gear tooth.
File details come from the government source that posted it. Updated .