Custom Fused Quartz Rods

Product Capability	Available Range / Options	Processing
Diameter	Ø2–50 mm typical	As-drawn, diameter-ground or polished
Length	100–1500 mm typical	Stock lengths, cut blanks or finished parts
Cross-section	Round solid rod	Plain, locally reduced or feature-machined
Cylindrical surface	As-drawn, ground, locally or fully polished	Complete length or selected axial zone
End condition	Cut, ground square, fire-polished or polished	Each end can receive a different finish
Secondary features	Flats, grooves, holes, tapers and formed ends	Grinding, drilling and flame working
Material	Fused quartz or optical-grade fused silica	Selected for thermal or optical service
Finished supply	Stock, matched cut lengths or finished components	Dimensional and surface inspection

Inquiry

Fused quartz rods are solid stock for high-temperature supports, electrical insulation, precision fixtures, optical components and further quartz fabrication. We supply round rods in typical diameters of Ø2–50 mm and finished lengths of 100–1500 mm, with as-drawn, ground or polished surfaces.

Rods can be supplied as production stock, cut blanks or finished components. Diameter grinding improves mechanical fit, cylindrical polishing creates a controlled optical or clean surface, and secondary processing adds flats, grooves, reduced ends and formed features.

Available Fused Quartz Rod Products

As-Drawn Round Rod

Solid rod with the original smooth drawing surface. It is the economical starting form for supports, spacers, insulation parts and later flame working.

Full-length stock
Cut blanks
Fire-finished ends

Diameter-Ground Rod

The outside diameter is ground where the rod must locate inside a bore, guide a moving assembly or maintain a controlled mechanical clearance.

Full-length grinding
Local fit diameter
Reduced sections

Polished Quartz Rod

Local or complete cylindrical polishing is available for light transmission, visual inspection, low-scatter surfaces and clean instrument components.

Local polish
Full cylindrical polish
Polished end faces

Finished Rod Components

Plain rod stock can be converted into a ready-to-install part with controlled ends and secondary mechanical or hot-formed features.

Flats and grooves
Cross-holes
Tapers
Formed or joined ends

Rod Manufacturing Capabilities

The manufacturing route changes with the required surface and final function. These capabilities can be combined on one rod rather than ordered as separate operations.

Continuous Drawing

Molten quartz is drawn into solid round stock with a smooth fire-finished cylindrical surface. Drawing provides repeatable production lengths for later cutting or hot working.

Round solid sections
Stable batch supply
As-drawn surface

Output: stock rod and fabrication blanks

Diameter Grinding

Centerless or cylindrical grinding removes the as-drawn diameter variation and creates a controlled mechanical surface over the complete rod or a selected axial zone.

Fit diameters
Reduced mounting areas
Ground matte surface

Output: controlled outside diameter and locating surfaces

Cutting & End Finishing

Rods are cut to finished length and supplied with cut, ground-square, fire-polished or polished ends. The two ends can use different treatments.

Matched cut lengths
Square ground ends
Fire or optical finish

Output: finished ends ready for assembly or bonding

Secondary Fabrication

Grinding, drilling and flame working add functional geometry without changing the entire rod into a custom profile.

Flats and grooves
Cross or axial holes
Tapers, bends and quartz joins

Output: installation-ready quartz rod components

Surface Finish Comparison

Rod finish	Main advantage	Typical use
As-drawn	Smooth fire-finished surface with minimum secondary processing	Supports, insulation, general fixtures and hot-work blanks
Diameter-ground	Improved mechanical size control and fit	Locating rods, precision supports and mating assemblies
Locally polished	Controlled clear surface only where it is functional	Inspection zones, optical interfaces and sensor assemblies
Fully polished	Clear cylindrical surface along the rod	Light transfer, optical instruments and visible process components

Finished Features and End Options

Cut ends suit further fabrication. Ground-square ends create a stable mechanical datum, fire-polished ends remove the sharp cut edge, and optically polished ends support light coupling or inspection. Flats, grooves and reduced diameters can be placed locally without processing the complete rod surface.

Applications

High-Temperature Supports

Solid locating and spacing members for furnaces, heaters and thermal equipment.

Electrical Insulation

Quartz support rods and standoffs for equipment requiring heat resistance and low electrical loss.

Quartz Fabrication

Starting stock for laboratory ware, lamp parts, holders and custom hot-worked components.

Optical & Sensor Parts

Polished rods used for light transfer, inspection and rigid instrument assemblies.

Custom Fused Quartz Rods

Rods are available as stock lengths, cut blanks or finished parts with ground, polished and formed features.

Request a Custom Rod

Engineering Data

Grade-Qualified Material Purity

Electric-fused / flame-fused quartz: SiO₂ ≥99.99%; synthetic JGS1-grade fused silica: ≥99.999%. Grade and lot certificate govern supplied material.

Engineering Data

Transparent Drawn-Rod Diameter Tolerances

Diameter band D (mm)	Diameter tolerance (mm)	Max ovality (mm)
2 < D ≤5	±0.15	≤0.15
5 < D ≤6	±0.20	≤0.20
6 < D ≤8	±0.20	≤0.20
8 < D ≤10	±0.20	≤0.20
10 < D ≤12	±0.30	≤0.30
12 < D ≤15	±0.30	≤0.30
15 < D ≤18	±0.30	≤0.30
18 < D ≤20	±0.40	≤0.30
20 < D ≤25	±0.50	≤0.40
25 < D ≤30	±0.50	≤0.40
30 < D ≤40	±0.60	≤0.50
40 < D ≤50	±0.70	≤0.60

These values apply to formed transparent rod stock. Diameter-ground precision rods use a separately agreed finished diameter; tighter stock tolerances can be quoted by order.

Product Examples