Straight Knurled Bushing | Precision Turning of Small Parts in Carbon Steel
Material
1215 Carbon Steel
Process
Die-Broached Straight Knurling + Automatic Lathe Machining
Finish Options
Natural, Zinc Plated, Zinc-Nickel Alloy, Nickel Plated
High Grip Strength & Reliable Press Fit Performance
This steel straight knurled bushing delivers a strong press-fit performance of up to 500 kg holding force.
With deep straight knurling, it can be firmly embedded into plastic components without loosening or slipping, ensuring stable torque transmission.
In modern mechanical assembly and precision transmission systems, even small bushings play a critical role in positioning, support, and torque transfer.
Manufactured from high-quality 1215 carbon steel and combining die-broaching with advanced machining processes, this component offers:
• Smooth surface finish
• Clean and uniform knurling
• High dimensional accuracy
Our expertise in precision turning of small parts ensures consistent performance and reliability across large production volumes.
Core Process: Die-Broached Straight Knurling
The straight knurling is formed in a single broaching process, offering clear advantages over traditional rolling:
Uniform and clean tooth profile
One-step forming ensures consistent tooth depth and spacing, with burr-free surfaces.
Controlled tooth depth (0.4–0.5 mm)
Provides strong grip without compromising the structural integrity of the base material.
High production efficiency
Ideal for mass production with excellent consistency across batches.
Precision Machining & Tight Tolerances
The overall geometry is completed by automatic lathes, ensuring strict dimensional control:
• Outer diameter tolerance: ±0.02 mm
• Length tolerance: ±0.03 mm
• Thread standard: 6H
Such precision makes this bushing suitable for demanding applications requiring high assembly accuracy.
Surface Finishing Options
To meet various corrosion resistance and appearance requirements, we offer:
Natural Finish: Suitable for dry environments and cost-sensitive internal applications
Zinc Plating: Basic corrosion protection with silver or colored finish
Salt spray resistance: 40–96 hours
Zinc-Nickel Alloy: Superior corrosion resistance, ideal for automotive or outdoor use
Salt spray resistance: 70–500 hours
Nickel Plating: Bright surface, improved wear resistance, and good corrosion protection
Salt spray resistance: 8–24 hours
This straight knurled bushing is widely used in:
Motor end covers
Gearbox positioning
Control knobs and handles
Furniture hardware
Medical devices
Once pressed into plastic or aluminum parts, the knurled structure effectively prevents rotation and ensures stable torque transfer.
Packaging & Logistics
To protect products during transportation:
• Individually packed in plastic bags or sorted by specification
• Packed in durable export cartons
• Each carton weight controlled at approximately 15 kg for easy handling and compliance with international logistics standards.
Customization & Production Capacity
We support full customization based on your drawings or samples.
Whether standard or non-standard parts, we deliver high-quality solutions with strict quality control.
• Nearly 50 lathes
• Over 30 secondary processing machines
• Fully and semi-automated production lines
Our strong capability in precision turning of small parts allows us to efficiently handle orders of various sizes and complexities.
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