Description
Bent, redrawn and thin quartz rods are defined by a forming operation rather than by a standard stock cross-section. A bent rod starts from straight quartz rod and is hot-formed to the required angle or radius. A redrawn rod is reduced from larger starting stock to a smaller finished section, while thin rod is the fine-gauge end of the same redraw process.
This page covers formed rod geometry. For standard faceted stock, see Square / Hexagonal / Shaped Quartz Rods. For a half-round cross-section, see Half-Round Quartz Rods.
Bent Rod
| Parameter | Specification |
|---|---|
| Process | Flame / hot forming |
| Bend Angle / Radius | Specified on the finished-part drawing |
| Straight-Section Length | Specified independently from the bend geometry |
| Post-Forming Annealing | Used to relieve forming-induced stress after bending |
The bent section and each straight section should be dimensioned separately. This keeps the finished geometry unambiguous where the rod must bridge two mounting points or follow a defined optical, thermal or mechanical path.
Redrawn Rod
| Parameter | Specification |
|---|---|
| Finished Diameter / Side Range | ~0.13–50 mm |
| Starting Material | Larger quartz rod or preform reduced to the required finished section |
| Available Profiles | Round, square, rectangular, triangular, V-groove, U-groove and U-channel |
| Process Driver | Smaller finished size, improved dimensional control, or a non-round profile |
| Dimensional Control | Draw-tower processing can improve OD, circularity, concentricity and straightness compared with ordinary first-draw stock |
Thin Rod
Thin quartz rod is fine-gauge round or shaped stock produced by redrawing. It is used when the standard 1–100 mm rod range found on general quartz rod pages is too large for the component.
| Parameter | Specification |
|---|---|
| Process | Redraw / draw-down from larger starting stock |
| Low-End Finished Size | Down to approximately 0.13 mm |
| Cross-Section | Round or shaped |
| Typical Use Driver | Fine lighting elements and small-scale industrial components |
Material
| Material Option | Use |
|---|---|
| Standard Clear Fused Quartz | General bent, redrawn and thin rod components |
| Low-OH Fused Quartz | Optical / IR-sensitive applications where hydroxyl content is part of material selection |
| Other Quartz Grades | Selected when transmission or purity requirements are part of the finished component specification |
For OH-content selection in optical or IR-sensitive parts, see Low-OH Fused Quartz.
What to Specify
| Part Type | Quotation Inputs |
|---|---|
| Bent Rod | Starting rod section, bend angle, bend radius, straight-section lengths, finished length and material grade |
| Redrawn Rod | Finished diameter or side dimensions, profile, dimensional tolerance, straightness requirement, length and material grade |
| Thin Rod | Finished gauge, round or shaped section, length, tolerance and quantity |
Related Rod Selection
| Product | Independent Parameter | Use It When |
|---|---|---|
| Bent / Redrawn / Thin Quartz Rods | Formed geometry or draw-down size | The part is bent, reduced below standard stock size, or produced as fine-gauge rod |
| Square / Hexagonal / Shaped Quartz Rods | Standard faceted cross-section | The required feature is the bar profile rather than a forming operation |
| Half-Round Quartz Rods | Width / height / radius | A flat mounting face and curved face are required on the same part |
| Quartz Light Guide Rods | Optical path / polished ends | The rod is purchased primarily for axial light transmission |
FAQ
Is redrawn rod the same as thin rod?
Thin rod is one result of redrawing. Redrawing can also be used to obtain tighter dimensional control or a non-round section at a finished size that is not necessarily extremely small.
Does bent rod need separate dimensions for the straight sections?
Yes. Specify each straight-section length separately from the bend angle and bend radius so the finished formed geometry can be checked independently.
Can quartz rod be redrawn to a shape other than round?
Yes. Square, rectangular, triangular and grooved sections can be produced through redraw. For standard non-redrawn faceted bar stock, see Square / Hexagonal / Shaped Quartz Rods.