Product photos
Actual photos, not renders
Illustration note
The image shows an actual part of this specification; appearance differs with surface treatment and head style, and the delivered part prevails.
Images are for appearance and structure reference; dimensions and tolerances are subject to the specifications and the applicable standards on this page.
Specifications
The parameters listed on this page are subject to final inspection and the applicable standards; items not listed follow the customer drawing or the order agreement and are not committed by default.
| Features | Extra-long sizes, high straightness |
|---|---|
| Value | Reduces vibration and wear and improves motor efficiency and service life |
| Typical application | Motor assembly |
Drawings & customization
No public catalogue is available for this series; drawing-based requests are handled per project.
Made to drawing / sample replication
A 2D drawing or a physical sample is enough for evaluation; once confirmed, we issue drawings, build samples and obtain first-article approval before volume production. Drawings and project information are handled under confidentiality requirements.
Manufacturing process
The usual process route for this product family; actual operations follow the drawing and order requirements.
- Cold headingLong shanks formed in one pass
- Heat treatmentStrength and toughness control
- StraighteningStraightness corrected piece by piece
- Straightness inspectionFull-length runout and sampling inspection of dimensions
Capacity & delivery
Taken from the company's published capacity and certification information; no unverified claims are included.
FAQ
Material, standards, surface treatment and installation points for this model; the data comes from the specification table on this page and from the national standards cited in the answers.
Q1Which applications suit the extra-long high-straightness bolt for motors?
Typical application listed in the product description on this page: motor assembly.
Q2What are the main features of the extra-long high-straightness bolt for motors?
Features listed in the product description on this page: extra-long sizes; high straightness.
Q3What does straightness mean for a bolt such as the extra-long high-straightness bolt for motors?
Straightness is the deviation of a bolt axis from an ideal straight line, measured typically as radial runout or as total bend over the full length. On extra-long bolts, self-weight and internal machining stress both cause bending, and insufficient straightness produces vibration and off-centre loading in high-speed rotation or at precision guide positions. This section explains the mechanism; the verification method follows the geometrical tolerance inspection of GB/T 1958, and the data for this model is subject to the specification table on this page. (Applies to this model: extra-long high-straightness bolt for motors.)
Q4How is straightness ensured and inspected on the extra-long high-straightness bolt for motors?
Cold straightening removes the residual bend left by machining, and finished parts are checked for radial runout with V-blocks and a dial indicator or with a dedicated gauge. The support positions and the reading method follow the drawing requirements agreed by both parties. This section explains the mechanism; the verification method follows the geometrical tolerance inspection of GB/T 1958, and the data for this model is subject to the specification table on this page. (Applies to this model: extra-long high-straightness bolt for motors.)
Q5What are the core performance and design features of the extra-long high-straightness bolt for motors?
Product description on this page: the product is an extra-long high-straightness bolt for motors with very high straightness accuracy, which keeps motor assembly stable and reliable, reduces vibration and wear, and raises motor efficiency and service life. ...
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