Call Us:+86 186 5551 2307
Mail Us:jhon@onaie.cn
Call Us:+86 186 5551 2307Mail Us:jhon@onaie.cn
The main shaft nut locks the mantle onto the main shaft, preventing axial movement, uneven liner wear, and costly shaft damage.
Item No :
2ft, 3ft, 4ft, 4 1/4ft, 5 1/2ft, 7ftPart Number :
ONA-5168-5702Payment :
TTProduct Origin :
ChinaColor :
CustomizedShipping Port :
ShanghaiLead Time :
30 DaysOrder(MOQ) :
1The main shaft nut is a critical locking component designed suitable for Symons cone crushers. It is manufactured from high‑strength alloy steel, heat‑treated to withstand extreme crushing forces and vibration. The precision‑cut threads match the main shaft perfectly, providing a tight, wobble‑free fit that keeps the mantle in its exact position throughout the crushing cycle.
Key Benefits of a Properly Installed Main Shaft Nut
A properly installed main shaft nut delivers several key benefits that operators value most：
1. First, it eliminates mantle shift, which is a common cause of uneven liner wear and product size inconsistency.
2. Second, it protects the main shaft from fatigue cracks and bending – expensive failures that often result from a loose or damaged nut.
3. Third, the nut’s durable construction resists corrosion and thread galling, making it reusable for multiple liner changes when inspected and maintained correctly.
Easy Installation in Three Simple Steps
Follow these steps to install the main shaft nut correctly and safely:
1. Clean the threads: Thoroughly clean the main shaft threads to remove all dirt, rust, and old debris. A clean surface ensures proper torque reading and prevents thread damage.
2. Apply anti‑seize compound: Coat the threads evenly with a high‑quality anti‑seize compound. This prevents galling, reduces friction during tightening, and makes future disassembly much easier.
3. Torque to specification: Use a calibrated torque wrench to tighten the main shaft nut to the value given in your crusher manual. No modifications or special tools are required beyond the torque wrench.
Proper torque keeps the mantle securely locked, eliminates axial movement, and extends the service life of both the nut and the main shaft.
By choosing ONA’s main shaft nut, you extend mantle life, reduce unplanned downtime, and lower long‑term maintenance costs. Keep your crusher running at peak efficiency – replace with ONA today. We also offer a complete range of other high‑quality spare parts for the same suitable for Symons 4.25FT model, including torch rings, adjustment lock posts, feed plates, springs, and sealing rings. For part number confirmation, custom orders based on your drawing, or any other inquiries, contact ONA directly.
ONA stocks a large inventory of bronze parts suit for Symons, including eccentric bushings and socket liners as listed below.
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The countershaft bushing is a critical wear part in the drive train of multi‑cylinder cone crushers.
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The main shaft nut locks the mantle onto the main shaft, preventing axial movement, uneven liner wear, and costly shaft damage.
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