About Yarn Twisting Bolsters
                Spindle Booster / Bolster Complete Series
For Ring Spinning, Twisting & Compact Spinning Frames
Spindle bolsters (also called spindle boosters or bearing units) are precision-engineered components that securely mount spinning or twisting spindles into ring frame machines. They ensure:
HZ Series Insert with Bolster (Standard & Heavy-Duty)
These are standard mechanical bearing units with steel inserts and bolsters used in ring spinning and twisting machines for various yarn types. They support a wide RPM range and are available in multiple sizes.
Model  | Code  | Length (mm)  | ID (mm)  | OD (mm)  | Thread (Mount)  | Weight (kg)  | Application  | 
HZ 33-0019  | 8711  | 146.0  | 21.7  | 8.8  | M25 1.5  | 0.313  | Ring spinning light duty  | 
HZ 35-0018  | 2991  | 163.5  | 21.7  | 8.8  | M25 1.5  | 0.342  | Ring spinning general purpose  | 
HZ 55-0952  | 204  | 188.0  | 28.2  | 12.0  | M32 1.5  | 0.734  | Twisting & ring spinning  | 
HZ 66-0014  | 227  | 229.0  | 32.5  | 14.0  | M35 1.5  | 0.927  | Twisting / worsted spinning  | 
HZ 68-0017  | 830  | 229.0  | 32.5  | 14.0  | M35 1.5  | 0.930  | Same as HZ 66 alternate build  | 
HZ 77-0952  | 381  | 273.0  | 37.8  | 16.0  | M40 1.5  | 1.750  | High-speed & heavy-duty twisting  | 
Used in: Cotton mills, woolen spinning, synthetic yarns, worsted yarn mills
HF Series High-Speed Mechanical Boosters (For Compact & Auto-Doff Systems)
The HF Series is designed for ultra-high-speed spinning frames, especially those using compact technology, auto doffers, or direct-drive spindles.
Model  | Max Speed (RPM)  | Length (mm)  | Thread (Mount)  | Top OD (mm)  | Bottom OD (mm)  | Weight (kg)  | Application  | 
HF 100  | Up to 25,000  | 229.0  | M35 1.5  | 28.0  | 38.0  | ~0.95  | Ultra-high-speed & compact frames  | 
HF 1  | Up to 22,000  | 188.0  | M32 1.5  | 28.0  | 36.0  | ~0.73  | High-speed ring frames (LMW, Rieter)  | 
HF 21  | Up to 20,000  | 163.5  | M25 1.5  | 21.7  | 30.0  | ~0.34  | Mid-speed twisting / standard ring  | 
HF 21C  | Up to 18,000  | 146.0  | M25 1.5  | 21.7  | 28.0  | ~0.31  | Compact spinning (lower speed)  | 
All HF units are:
Dynamically balanced
Sealed and greased for life
Anti-vibration mounted
Built for low noise, smooth rotation, and high-speed performance
HZ vs HF Series Feature Comparison
Feature  | HZ Series  | HF Series  | 
Application Type  | General spinning & twisting  | High-speed & compact spinning  | 
Max RPM  | Up to ~20,000  | Up to 25,000 (HF 100)  | 
Construction  | Standard steel insert + bolster  | One-piece precision-built unit  | 
Balancing  | Optional  | Dynamically balanced  | 
Lubrication  | Manual or automatic (grease/oil)  | Greased for life  | 
Maintenance  | Requires periodic attention  | Maintenance-free  | 
Recommended Use by Machine
Machine  | Recommended Spindle Booster  | 
LMW LF4200A (Auto Doffer)  | HF 1 or HF 100  | 
Rieter G37 / G38  | HF 21 or HF 1  | 
Zinser 72XL / 451  | HF 21C or HZ 66 / HZ 68  | 
Marzoli FT5E  | HZ 66 or HF 21C  | 
Toyoda / KKTM  | HZ 33 / HZ 35  | 
Summary
With a full range of HZ and HF series spindle boosters, manufacturers can support:
Ring spinning (standard and compact)
Twisting (light to heavy yarn)
High-speed auto-doffing systems
Worsted / synthetic applications
Speed Range Covered: 18,000 to 25,000 RPM
Downtime Reduced, Yarn Quality Improved, Maintenance Simplified
Durable Steel ConstructionThe steel composition of our Yarn Twisting Bolsters ensures exceptional wear resistance and longevity, which is vital for the demanding environment of spinning machines. The robust build minimizes maintenance requirements and supports consistent, uninterrupted textile production, even under rigorous industrial usage.
Optimized for High-Speed OperationsSpecifically crafted for speed, these bolsters operate smoothly at up to 12,000 RPM. Their precision-engineered design reduces vibration and maintains a controlled noise level of 75 db, supporting safe and efficient yarn twisting processes. This allows uninterrupted high-volume textile outputs to meet industrial demands.
   FAQs of Yarn Twisting Bolsters:
   
   
      
Q: How are Yarn Twisting Bolsters used in spinning machines?
 A: Yarn Twisting Bolsters serve as essential spindles in spinning machines, guiding and twisting yarn at high speeds to ensure uniformity and strength in the final product. Their steel construction provides stability during the twisting process, supporting efficient textile output.
      
      Q: What are the key benefits of using steel Yarn Twisting Bolsters?
 A: Steel Yarn Twisting Bolsters offer robust durability, reduced maintenance, and dependable performance even under high-speed conditions. Their resistance to wear and noise reduction features help maintain machine efficiency and protect delicate yarn structures during industrial spinning.
      
      Q: When should Yarn Twisting Bolsters be replaced?
 A: Bolsters should be inspected regularly and replaced if significant wear, instability, or noise increases occur. While their steel design is long-lasting, proactive replacement ensures optimal performance and avoids production downtime, aligning with the included 1-year warranty period.
      
      Q: Where are these Yarn Twisting Bolsters manufactured and supplied from?
 A: Our Yarn Twisting Bolsters are manufactured in India, where our facilities adhere to international quality standards. As exporters, manufacturers, and suppliers, we deliver these components to textile operations worldwide, ensuring reliable supply chains for industrial clients.
      
      Q: What is the process for installing a new Yarn Twisting Bolster in a spinning machine?
 A: Installing a Yarn Twisting Bolster involves carefully removing the worn spindle, aligning the new bolster within the spindle holder, and securing it as per the spinning machines specifications. Proper installation guarantees stable performance and maximizes product lifespan.
      
      Q: How does the noise level of 75 db affect textile production environments?
 A: A noise level of 75 db is considered moderate for industrial settings and helps create a more comfortable work environment for operators. This feature ensures the spinning machines run efficiently without excessive auditory strain or disturbance.
      
      Q: What warranty coverage is provided for these Yarn Twisting Bolsters?
 A: Each Yarn Twisting Bolster is covered by a 1-year warranty, which protects against manufacturing defects. This warranty assures buyers of product reliability and offers support in case of issues within the coverage period.