Expanding Mandrel for Secure Internal WorkholdingThe expanding mandrel is designed to provide internal gripping for cylindrical workpieces during turning, grinding, and inspection. It ensures concentric clamping and stable support for thin-walled or delicate parts where external chucks are unsuitable. The mandrel expands to nominal diameter and locks workpieces with even pressure distribution.Procurement evaluation emphasizes mandrel diameter range, expansion mechanism and tolerance control. This SKU is offered for bulk sourcing with optional build-to-print production and inspection documentation for OEM and production buyers.
Product Description
Industrial Assembly and Sector Applications
Expanding mandrels are used in turning, finishing and metrology operations to secure internal bores during machining and inspection. They are common in bearing production, tubing finishing and precision component assembly where internal gripping minimizes distortion.
Technical Specifications & Capability
Key parameters include nominal bore range, expansion range, locking mechanism and achievable concentricity. Construction materials and surface finish influence durability and repeatability. Dimensional inspection and CMM validation can be provided for production lots upon request.
Dispatch and Compliance Readiness
Parts are packaged to protect finished surfaces and shipped with inspection documents when requested. Lead times vary by design complexity and quantity. Build-to-print options are supported for OEM workflows.
Request Volume Pricing and Samples
Submit application dimensions and target tolerance for sample and pricing guidance.
Frequently Asked Questions
What expansion range is supported? Expansion ranges depend on mandrel design; provide required bore range and tolerances to confirm capability.
Can mandrels be produced to CAD drawings with inspection? Yes. Build-to-print production with dimensional validation is available for OEM orders.
What inspection documentation is provided? Dimensional inspection reports and batch traceability can be issued on request.
How are bulk orders packaged and scheduled? Packaging protects finished surfaces; lead time depends on design and batch quantity.
Description provided by m/s micro engineers.
Specifications
Product Name
Expanding Mandrel
Product Type
Expanding mandrel for internal bore clamping and precision machining
Minimum Diameter
6 mm
Maximum Diameter
250 mm
Maximum Length
400 mm
Tolerance Capability
Up to ±5 microns depending on geometry and application
Materials
EN353, SAE 8620, 20MnCr5, EN31, OHNS, EN47, EN24, EN8, die steel, carbide steel, other customer-specified materials
Custom manufactured according to customer drawings and requirements
Fitment
Exact machine fitment to be confirmed by buyer
Inspection Criteria
To be confirmed based on customer drawings and application requirements
MOQ
1
Store Name
M/S MICRO ENGINEERS
Use cases
Category
Expanding Mandrels
Primary application
Wholesale, distribution, and international sourcing
Brand
micro engineers
Product type
Product
Logistics & handling
Lead time
On request
Packaging
As per buyer requirement
Storage condition
As recommended by supplier
Origin
India
Form
As listed by supplier
Commercials (this seller)
Minimum order
1 unit
Lead time
On request
Payment terms
As per negotiated commercial agreement.
Buyer questions
Frequently asked by buyers
Common questions B2B buyers ask before sourcing Expanding Mandrel. Answers compiled from verified sellers' commercial terms and platform data.
Q: What is the main use of this expanding mandrel?
A: It is used for internal bore clamping and precision work holding during machining, grinding, hobbing, turning, inspection, and roll testing.
Q: What material grades are available for manufacture?
A: Stated material options include EN353, SAE 8620, 20MnCr5, EN31, OHNS, EN47, EN24, EN8, die steel, carbide steel, and other customer-specified materials.
Q: What size range can this mandrel cover?
A: The stated size range is minimum diameter 6 mm, maximum diameter 250 mm, and maximum length 400 mm.
Q: What precision level is mentioned for this product?
A: Tolerance capability is stated up to ±5 microns, depending on geometry and application.
Q: Can this mandrel be customized to machine drawings?
A: Yes. Custom manufacturing is available as per customer drawings, machine specifications, and application requirements.
Q: Which industries or operations commonly use this product?
A: It is suited for gear tooling, CNC machining, precision grinding, internal bore clamping, inspection, and roll testing operations.
Q: What details should buyers provide for quotation?
A: Buyers should share drawings, material grade, dimensions, tolerance requirements, machine fitment details, and inspection criteria.
Q: Is the product suitable for wholesale or export procurement?
A: Yes. It is positioned as a B2B industrial product for bulk order, OEM customization, and export-oriented procurement.
Question not answered? Ask sellers directly — typical response within 4 hours.
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