Haydonkerk Pittman

Lead Screw Nut Selection

Kerk™ Lead Screw Assemblies are modified acme thread forms optimized for performance and available in a broad range of lead screw diameters, leads and nut styles, custom designed for your application. Kerk lead screws are self-adjusting, maintenance-free and require no lubrication. Providing maximum accuracy, high reliability, smooth, quiet operation and low cost, Kerk lead Screw Assemblies are your best choice for high performance linear motion control.

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Watch this informative video from Design World about the tribology and material selection for Haydon Kerk's polymer lead screw nuts, and lubrication options. Watch Video

Nut Feature	Nut Style
Nut Feature	• = Good •• = Better ••• = Best
	Units	ZBX	ZBA	ZBM	KHD	WDG	NTB	VHD	BFW
Max Dynamic Load	lb	35	55	1	20	75	200	350	500
Max Dynamic Load	N	155	245	4.4	89	333	890	1557	2224
Compactness		••	••	•••	••	•••	••	•	•••
Typical Drag Torque		••	••	••	•••	••	••	•••	N/A
Vibration Damping	horizontal	•••	•••	•••	••	•	•	••	N/A
Vibration Damping	vertical	•••	•••	•••	••	•	•	••	N/A
Smoothness		••	•••	••	••	••	••	••	•
Backlash Compensation		••	•	••	•••	•••	•••	•••	N/A
Drag Adujusted		N/A	•••	N/A	••	N/A	•	••	N/A
Stiffness		••	••	••	•••	•••	•••	•••	N/A
Easy to Modify		••	•	•	•	•	•••	•	•••
Custom Material		••	••	•	•	•	•••	•	•••
Best for Fine Leads	<.2",5mm	•••	•••	•••	•••	•••	••	•••	•••
Best for Long Leads	>1",25mm	•••	•••	N/A	•••	•••	•••	•••	•••