INDUSTRY COMPONENT

T-Slots or Threaded Holes

Modular mounting and positioning features on granite base platforms for industrial machinery.

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Component Specifications

Definition
T-slots are precisely machined grooves with undercut T-shaped profiles running along granite base surfaces, allowing secure clamping and positioning of machine components using T-bolts. Threaded holes are tapped holes with standardized threads (typically metric or imperial) drilled into the granite, providing direct threaded fastening points. Both features enable flexible, rigid, and repeatable mounting of equipment, fixtures, and accessories on vibration-damping granite bases in precision manufacturing environments.
Working Principle
T-slots work by accepting T-bolts that slide into the slot and rotate 90 degrees to lock under the overhanging edges, distributing clamping forces across the granite surface. Threaded holes provide direct threaded engagement for bolts or studs, creating fixed mounting points. Both utilize granite's dimensional stability, mass, and vibration-damping properties to maintain alignment and reduce machine tool errors.
Materials
Granite (typically black or gray granite with fine grain, low porosity, and high quartz content), ASTM C615 or equivalent; optional stainless steel or brass threaded inserts for reinforced threaded holes.
Technical Parameters
  • Slot Depth 10-25mm
  • Slot Width 8mm, 10mm, 12mm, 14mm, 16mm, 20mm
  • Thread Size M6, M8, M10, M12, 1/4-20, 5/16-18, 3/8-16
  • Slot Spacing 50mm, 100mm, 150mm grid
  • Surface Finish Ground and lapped to 1-5μm Ra
  • Granite Flatness 0.01mm/m to 0.05mm/m
Standards
ISO 230-1, ISO 10791-7, DIN 876, DIN 877

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for T-Slots or Threaded Holes.

granite base T-slots threaded holes machine mounting precision granite platform industrial equipment bases modular clamping system T-Slots or Threaded Holes T-Slots or Threaded Holes in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Granite Base Platform

A precision granite platform that serves as the stable foundation for an Automated Coordinate Measuring Machine (CMM) system.

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Engineering Analysis

Risks & Mitigation
  • Granite cracking during machining or overload
  • Thread stripping in granite under cyclic loads
  • Misalignment from improper slot or hole placement
  • Contamination (chips, coolant) affecting mounting accuracy
FMEA Triads
Trigger: Over-torquing bolts in threaded holes
Failure: Thread stripping or granite micro-cracking
Mitigation: Use torque wrenches, thread inserts, and load distribution plates
Trigger: Impact or shock loads on T-slot edges
Failure: Slot chipping or fracture
Mitigation: Design with rounded slot edges, use protective covers, and limit dynamic loads
Trigger: Thermal expansion mismatch between granite and steel components
Failure: Loss of alignment or stress cracks
Mitigation: Account for CTE in design, use flexible couplings, and control environment temperature

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Slot width ±0.05mm, hole position ±0.1mm, thread class 6H for metric or 2B for imperial
Test Method
CMM verification per ISO 10360, thread gauge testing, load testing to 150% of rated capacity

Buyer Feedback

★★★★☆ 4.5 / 5.0 (10 reviews)

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the T-Slots or Threaded Holes so far."

"Testing the T-Slots or Threaded Holes now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

What are the advantages of T-slots over threaded holes on granite bases?

T-slots offer greater flexibility for repositioning components without retapping, while threaded holes provide higher rigidity and load capacity for permanent mounts.

How do you maintain granite T-slots and threaded holes?

Clean regularly with compressed air and mild detergent, avoid abrasive cleaners, and inspect for chipping or thread wear; use thread inserts if threads strip.

Can T-slots and threaded holes be added to existing granite bases?

Yes, but requires precision machining by specialists to avoid cracking the granite; retrofitting is costly and may affect structural integrity.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for T-Slots or Threaded Holes

T-slots Table Frame & Structure