Chesterton 53K Mill Rotary Seal

Chesterton 53K Premium Mill Rotary Seals
Large Shaft Run-Out Compensation


​​​Availability: North America, Europe, Middle East, Africa​​

Chesterton 53K seals are high-performance radial seals for heavy duty, dynamic rotary seal applications. These seals provide long-lasting sealing and protective solutions that withstand high speed and large misalignment of shafts and rolls in heavy industry.

The 53K represents advanced technology: Combined finger and garter springs in combination with high performance elastomers, which outlass the conventional radial oil seals in the most difficult applications. The outer metal case of 53K is cold pressed. The elastomer part is manufactured by compression molding technology that is vulcanized to the metal case which provides very tight dimensional, geometrical tolerances.

The unique design with a flat outer metal case ensures improved fitting in the seal cavity and an improved centric position. Additionally, this design allows installation in stuffing boxes without end covers.

According to industrial standards sizing, the 53K is a direct retrofit, which eliminates the need of equipment modification. The 53K is offered in different designs based on application requirements.

​Typical Applications: High speed gear drives, high speed back-up rolls in cold mills, work rolls in hot and cold mills, aluminum foil mills, paper machines, cement plants, power plants

Unique lip pre-loaded system with highly elastic garter-finger spring combination
Large shaft run-out compensation capability
Unique lip design combined with auto-lubricated elastomer offer low friction and ultra high surface speed
Direct retrofit eliminates equipment modification​
High-performance elastomers ensure plant-wide usage and long service life​​
Elastomers NBR80+PTFE FKM70+PTFE
Material of metal caseFe-PO3Fe-PO3
Material of steel filler ringFe37Fe37
Material of spring carrierAISI 301 AISI 3301
​Materials of garter springAISI 316 AISI 316
Lubricating greases -20°C to 100°C (-4°F to 212°F)
20°C to 200°C (-4°F to 392°F)
Mineral oils-20°C to 100°C (-4°F to 212°F)
-20°C to 200°C (-4°F to 392°F)
Surface speed m/s (ft/min)25 (4921 ft/min)
25 to 35 (4921 to 6889)
Technical pressure MPa (psi) 51K, 51KW, 51KL Solid0.05 (7.25)0.05 (7.25)
Technical pressure MPa (psi) 51K, 51KW, 51KL Split0.1 (14.5)0.1 (14.5)
Size Range mm (inch)** Seal OD300 to 1200 (12 to 47)300 to 1200 (12 to 47)



Product Datasheet: 53K (English) Datasheet: 53K (English)pdf



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