35K / SWRCH35K Steel for Electric Linear Actuator Lead Screw Shafts
Junxiong Metal can evaluate 35K or SWRCH35K round steel blanks for buyer-specified shaft components before thread rolling or machining. The RFQ must identify the ordered material standard, drawing, diameter, tolerance, cut length, straightness, surface, thread-forming or machining route, heat treatment, hardness, quantity and MTC requirements.
Send a complete actuator lead screw shaft blank RFQ or send the grade, drawing, blank size, quantity and destination by WhatsApp.
Material-use boundary: This page does not claim that SWRCH35K is suitable for every electric actuator lead screw. Final material selection and processing approval belong to the buyer’s engineering team.
Important: This page is for steel blanks used before thread rolling, machining or actuator assembly. Finished ball screws, finished lead screw kits, actuator motors and retail repair parts are outside this page’s scope.
Factory Round-Bar and Export Packing Evidence
These photographs show representative Junxiong cold-drawn round-bar production and export packing. They support bar-form supply capability before thread rolling or machining, but they are not proof that the photographed bars are 35K/SWRCH35K lead-screw blanks. Confirm grade, heat number, diameter, tolerance, straightness, surface condition and inspection documents before production.
Review the factory, ISO 9001 and order-specific document boundaries before qualification. The finished shaft drawing and the matching heat-specific MTC remain separate approval inputs.
Short Answer: Can Junxiong Quote a 35K or SWRCH35K Shaft Blank?
Yes, when the buyer’s drawing or ordered standard calls for this material direction. Junxiong reviews the blank supply condition before thread rolling or machining, while the buyer confirms final grade suitability, heat treatment, hardness, fatigue or load requirements and finished-component performance.
Technical Facts for Actuator Lead Screw Shaft Steel Buyers
| Product form | 35K / SWRCH35K round steel blank, cut-to-length steel bar and screw shaft blank before thread rolling or machining. |
|---|---|
| Material direction | SWRCH35K is a JIS cold-heading-quality steel designation. Quotation is subject to the buyer’s ordered standard, drawing, chemical and mechanical requirements and MTC. |
| Common component names | Lead screw shaft blank, actuator screw rod blank, threaded spindle blank, power screw shaft blank and screw transmission component blank. |
| Quotation data | Grade, diameter, tolerance, cut length, straightness, surface condition, thread rolling or machining plan, quantity and destination country. |
| Processing review | Cold drawing, straightening, fixed-length cutting, anti-rust packing and export bundling can be reviewed. Finished thread machining must be confirmed separately if required. |
| Excluded traffic | Finished ball screws, CNC lead screw kits, 3D printer lead screws, replacement actuators and retail repair parts are not the target of this page. |
Standards and Grade-Route Verification
- GB/T 6478-2015: the Chinese national standard covering steels for cold heading and cold extruding. The RFQ must still identify the exact ordered grade and revision.
- JIS G 3507-1:2021: the Japanese standard for carbon steel wire rods for cold heading, including the wire-rod route associated with SWRCH designations.
- JIS G 3507-2:2005: the Japanese standard for carbon steel wires for cold heading, relevant when the buyer specifies a downstream wire route.
- Baosteel Q/BQB 517-2023: an official steelmaker specification that lists SWRCH35K and cross-references the JIS G 3507-1:2021 wire-rod route. It is a grade-reference source, not a Junxiong heat certificate.
Grade-route boundary: similar carbon content or trade shorthand does not make Chinese 35K, JIS SWRCH35K and a customer-specific 35K requirement automatically interchangeable. The purchase order must identify the governing standard, product form, chemistry and mechanical limits, delivery condition, thread-rolling or machining route, heat treatment and required MTC. These links are reference sources, not Junxiong batch certificates or proof of finished lead-screw performance.
Steel Blank for Actuator Lead Screw Shafts and Thread Rolling
This page covers a lead screw shaft steel blank or actuator screw-shaft material before thread rolling or machining. A push rod and a lead screw shaft are different components: the required diameter, surface, straightness, heat treatment, machining allowance and thread-forming route must be reviewed separately.
Technical Facts to Confirm Before Thread Rolling
- Material: 35K / SWRCH35K or buyer-specified equivalent candidate, subject to standard review.
- Blank size: diameter and allowance matched to the final thread and forming process.
- Bar control: straightness, surface defects, decarburization and hardness requirements.
- Process route: thread rolling, machining, heat treatment and end features confirmed by drawing.
- Inspection: MTC, dimensions and any agreed mechanical-property or hardness report.
Can one steel specification be used for every actuator screw shaft?
No. Material suitability depends on load, thread geometry, forming route, heat treatment and the buyer’s acceptance standard. Junxiong reviews the drawing and purchase specification before confirming supply.
Buyer Checklist Before Quoting Lead Screw Shaft Steel Blanks
- Ordered material standard and exact grade designation.
- Component drawing, final application and processing route.
- Diameter, tolerance, cut length and straightness.
- Thread rolling, machining, cold forming or grinding plan.
- Heat treatment, target hardness and surface treatment.
- Load, fatigue or service-condition requirements controlled by the buyer.
- MTC, heat-number traceability and third-party inspection requirements.
- Trial quantity, annual demand and destination country.
Suitable Buyer Types
- Electric linear actuator manufacturers
- Lead screw shaft manufacturers
- Actuator screw shaft manufacturers
- Thread rolling shops
- Precision shaft manufacturers
- Furniture actuator and medical bed actuator component suppliers
Lead Screw Material Before Thread Rolling or Shaft Machining
Actuator manufacturers may search for lead screw material, threaded spindle steel or a power screw shaft blank before they specify a finished screw. Junxiong reviews 35K or SWRCH35K round steel blanks at this upstream stage. The final thread form, lead accuracy, heat treatment, hardness, coating and actuator performance remain subject to the buyer’s approved drawing and process.
Do Not Quote a Finished Screw from Bar Diameter Alone
Bar diameter is only one input. The RFQ must also state machining or thread-rolling allowance, straightness, surface condition, decarburization limits where applicable, cut length, MTC requirements and the destination country.
FAQ: 35K / SWRCH35K Steel for Actuator Lead Screw Shafts
Can Junxiong supply steel blanks before thread rolling?
Yes. Junxiong can review cut-to-length round steel blanks for thread rolling or machining when the buyer provides grade, diameter, length, tolerance, straightness and quantity.
Do you supply finished lead screw kits?
No. This page focuses on steel blanks for actuator lead screw shaft manufacturers. Finished lead screw kits, nuts, CNC kits and retail replacement parts are not the target products.
Is 35K / SWRCH35K suitable for every actuator screw shaft?
No single grade should be assumed for every design. 35K / SWRCH35K can be reviewed when the buyer’s drawing or engineering requirement calls for this material direction. Final material selection depends on load, forming, machining, heat treatment and customer standards.
What information is required for quotation?
Please send steel grade, diameter, tolerance, cut length, straightness, drawing, thread rolling or machining plan, quantity and destination country.
Can material certificates be supplied?
MTC, heat number tracking and selected inspection requirements can be discussed before production according to order terms.
Request a Lead Screw Shaft Steel Blank Quotation
Send your actuator screw shaft drawing, material grade, diameter, cut length and quantity to Junxiong Metal for factory quotation.
Use the technical RFQ form or contact Junxiong Metal on WhatsApp.
Steel Blank or Finished Lead Screw Shaft?
Supply boundary: state whether the RFQ is for a cold drawn steel blank, a cut and machined shaft, or material intended for a finished lead screw. Junxiong does not assume responsibility for the finished screw without written process confirmation. Material, diameter, straightness, heat treatment, machining allowance and the downstream thread-rolling route must be reviewed against the drawing.
Grade and product-form check: a 35K, SWRCH35K or SWCH35K reference is not accepted as an automatic one-to-one substitution. JIS G 3507-1 covers carbon-steel wire rods for cold heading, while this RFQ concerns a cold drawn straight bar or shaft blank. State the exact designation, governing standard, delivery form, heat treatment, mechanical properties and MTC requirements.
A push rod and a lead screw shaft are different components. One steel specification or one process route is not automatically suitable for every actuator design.