Restore. Rebuild. Relaunch.
Extend the life of your critical components with our expert refurbishment services.
Refurbishment & Life-Extension Services
Restore your extrusion performance without buying new. Shri Radhe Krishna Extrusions brings worn screws and barrels back to OEM-grade geometry and surface finish—with fast turnaround, traceable QC, and optional wear-life upgrades (RK Lightning HVOF / ExtruMax).
Barrel Boring (ID Re-Machining)
Typical symptoms
- Rising melt temperature/pressure to hold rate
- Output drift, ovality, and wall-thickness variation
- Start-up scrap, gels/black specks from stagnation
What we deliver
- Wear mapping & material check: ID profile scan, hardness/steel verification
- Precision re-machining: ID restored to true, round, stable surface with controlled finish
- Heat treatment path: Nitrided barrels receive re-nitriding after machining (as required); bimetallics are verified for liner thickness before any cut
- Matched geometry: We re-size the mating screw OD to the new barrel ID—or, where needed, we can install a tool sleeve to return the ID to original spec so clearances stay correct across all zones.
- QC pack: Before/after measurements, concentricity/straightness checks, finish reports
When to choose it
- ID wear, scoring, peppering, or thermal banding issues
- You want to extend barrel life cost-effectively while preserving process consistency
Optional life-extension
- Pair with RK Lightning or ExtruMax screw coating for superior abrasion/erosion resistance
Screw Flight / Helix Restoration
Typical symptoms
- Lower throughput at the same RPM/back-pressure creep
- Poor mixing/higher energy per kg, more gels
- Visible flight land wear, nicks, washout—especially on abrasive or filled grades
What we deliver
- Core evaluation: Straightness, hardness, and crack check; keep the core if sound
- Build-up & re-profile: Hardfacing on the flight OD, re-machined to nominal profile and clearance
- Finish & treat: Polishing, heat treatment (as process requires), final grind and inspection
- Balance & fit: Dynamic runout check and fit verification for your barrel ID
Alloy options
- Wear-focused, corrosion-focused, or balanced hardfacing—selected to your resin family (PVC, HDPE/PP, PA, PET, ABS, EVA/TPU, filled compounds, recyclate mixes, etc.)
Optional life-extension
- RK Lightning or ExtruMax coating on the restored screw for 2–3× typical service life in abrasive or corrosive duty
Mirror Polishing (Low-Adhesion Finish)
Best for
- Adhesive/tacky materials (soft PVC, EVA, TPU), masterbatch, and color changes
- Situations where geometry is still within spec, but you need faster purging and cleaner melt
What we deliver
- Ultra-smooth, low-adhesion surface on the screw flights and lands
- Easier color/material changeover, reduced hang-ups and burn-ins
- Lower shear hotspots and improved melt cleanliness
Good to know
- Mirror polishing does not change geometry—ideal as a preventive life-extension step after inspection
Barrel Boring (ID Re-Machining)
Typical symptoms
- Rising melt temperature/pressure to hold rate
- Output drift, ovality, and wall-thickness variation
- Start-up scrap, gels/black specks from stagnation
What we deliver
- Wear mapping & material check: ID profile scan, hardness/steel verification
- Precision re-machining: ID restored to true, round, stable surface with controlled finish
- Heat treatment path: Nitrided barrels receive re-nitriding after machining (as required); bimetallics are verified for liner thickness before any cut
- Matched geometry: We re-size the mating screw OD to the new barrel ID—or, where needed, we can install a tool sleeve to return the ID to original spec so clearances stay correct across all zones.
- QC pack: Before/after measurements, concentricity/straightness checks, finish reports
When to choose it
- ID wear, scoring, peppering, or thermal banding issues
- You want to extend barrel life cost-effectively while preserving process consistency
Optional life-extension
- Pair with RK Lightning or ExtruMax screw coating for superior abrasion/erosion resistance
Screw Flight / Helix Restoration
Typical symptoms
- Lower throughput at the same RPM/back-pressure creep
- Poor mixing/higher energy per kg, more gels
- Visible flight land wear, nicks, washout—especially on abrasive or filled grades
What we deliver
- Core evaluation: Straightness, hardness, and crack check; keep the core if sound
- Build-up & re-profile: Hardfacing on the flight OD, re-machined to nominal profile and clearance
- Finish & treat: Polishing, heat treatment (as process requires), final grind and inspection
- Balance & fit: Dynamic runout check and fit verification for your barrel ID
Alloy options
- Wear-focused, corrosion-focused, or balanced hardfacing—selected to your resin family (PVC, HDPE/PP, PA, PET, ABS, EVA/TPU, filled compounds, recyclate mixes, etc.)
Optional life-extension
- RK Lightning or ExtruMax coating on the restored screw for 2–3× typical service life in abrasive or corrosive duty
Mirror Polishing (Low-Adhesion Finish)
Best for
- Adhesive/tacky materials (soft PVC, EVA, TPU), masterbatch, and color changes
- Situations where geometry is still within spec, but you need faster purging and cleaner melt
What we deliver
- Ultra-smooth, low-adhesion surface on the screw flights and lands
- Easier color/material changeover, reduced hang-ups and burn-ins
- Lower shear hotspots and improved melt cleanliness
Good to know
- Mirror polishing does not change geometry—ideal as a preventive life-extension step after inspection
Our Process & Quality Controls (Traceable)
Intake & triage – serial capture, application review, service recommendation
Metrology – ID/OD scans, pitch/lead, straightness, hardness/material verification
Root-cause analysis – wear mapping and clearance study; repair plan approval
Re-work – boring/re-profiling/polishing; heat treatment when required
Finish & QC – grind, balance, surface finish, concentricity/roundness checks
Documentation & dispatch – before/after report, handling/ installation guidance, safe packing
Applications We Support
- Pipe & Profile: PVC (rigid/plastified), HDPE, PP, PPR, multi-layer
- Hose & Tube: Garden, braided, suction, lay-flat, medical tubing
- Film & Sheet: Monolayer, ABA, multilayer, PPTQ, thermoforming sheet
- Compounding & Recycling: Filled/abrasive recipes, masterbatch, regrind blends
- Cable & Specialty: HFFR, TPU, EPDM-based, engineering resins
OEM-agnostic: We refurbish screws and barrels across most global machine models.
Applications We Support
Refurbish When…
The core/liner integrity is sound and geometry can be restored cost-effectively.
Replace When…
Structural cracks, severe washout, or liner depletion exceed safe limits (we’ll advise after inspection).