Products introdution
Slotted Nickel Threaded Rod Studs is a precision linear motion component made from high-purity nickel (Ni200 or Ni201) as the base material, with one (or more) full-length keyways milled axially along the lead screw shaft. It combines the "corrosion resistance of pure nickel" with the "anti-rotation and guiding functions of the slotted structure," and is specifically designed for highly corrosive environments where the lead screw must move only in a linear up-and-down motion without any rotational movement.
Simply put: while a standard lead screw rotates along with the nut, a slotted nickel lead screw has its rotational freedom locked by a guide key wedged in the slot; when the motor turns, it can only move straight up and down.
Grooved pure nickel lead screws = custom functional components consisting of pure nickel rod stock + threading + slot milling. Their core value lies in "providing adjustable, positionable mechanical connections and electrical conductivity in environments-such as those involving strong alkalis, high temperatures, vacuum, and electrochemical conditions-where stainless steel and ordinary steel cannot perform adequately."
Materials and Chemical Composition
| Material | Related Standard | Ni+Co Content | Carbon Content | Features and Positioning |
|---|---|---|---|---|
| Ni200 | UNS N02200 / W.Nr.2.4066 / ASTM B160 | ≥99.5% | ≤0.15% | Most commonly used in industry; offers slightly higher strength and comprehensive corrosion resistance. |
| Ni201 | UNS N02201 / W.Nr.2.4068 | ≥99.9% | ≤0.02% | Ultra-low carbon, high purity; resistant to high temperatures without embrittlement; the top choice for electronic and precision components |
The Purpose of "Slotting"
The Purpose of "Slotting": More Than Just Anti-Loosening
"Slotting" refers to the machining of specific grooves into the shaft or threaded portion of a lead screw. Depending on the design, these grooves serve the following primary functions:
Anti-rotation groove (guide groove): This is the most critical function. In mechanisms such as lead screw lifts, the lead screw must convert the rotational motion of the motor into the linear motion of the nut. If the nut rotates along with the lead screw, linear motion cannot be achieved. By machining a longitudinal groove on the lead screw and installing a mating guide key on the nut, the nut's rotational freedom is locked, forcing it to move only in the axial direction.
Processing Grooves (e.g., "Grooving" Grinding): In the manufacturing process of precision lead screws, "grooving" may also refer to a rough grinding operation. After heat treatment, a grinding wheel is first used to grind triangular grooves into the threads. The purpose is to provide allowance for subsequent semi-finishing and finishing operations, preventing the lead screw from burning out or cracking due to excessive material removal in a single grinding pass.
Keyway: Used for keyed connections with parts such as gears and couplings to transmit torque.
Common Specification Range
Typical Parameter Ranges
Nominal diameter: φ4 – φ60 mm (larger sizes available upon request)
Lead: 1 – 20 mm
Length: 50 – 2000 mm (up to 3000 mm+ available upon request)
Groove Width: 3 – 12 mm (matched to diameter and guide key specifications)
Groove Depth: 1.5 – 5 mm. Single groove is most common; dual grooves (180° symmetrical) are available for heavy-duty applications or high anti-rotation requirements.
Main Areas of Application
1 Chemical and Chlor-Alkali Industries (Largest Segment)
- Caustic Soda (NaOH) Production Units: Electrode lifting and lowering in ion-exchange membrane electrolysis cells; evaporator liquid level control
- Reactors / Storage Tanks: Lifting and lowering of agitators in corrosive media; opening and closing of manholes
- Valve Actuators: Valve stems for valves handling highly corrosive media (nickel valve stems are standard products; slotted anti-rotation designs are common)
2 Electroplating and Surface Treatment Industry
- Automated electroplating lines: Lead screws for lifting racks in plating tanks, which are continuously immersed in the plating solution
- Anode lifting mechanisms: Height adjustment of anode plates in nickel and chrome plating lines
- Stainless steel lead screws rust and seize within six months in electroplating workshops, whereas nickel lead screws can operate maintenance-free for extended periods
3 Semiconductors and Electronics
- Wafer processing equipment: Precision lifting stages in environments with corrosive process gases
- Vacuum chambers: Feed adjustment lead screws requiring low outgassing rates
- Electroplating interconnect processes: Conveyor mechanisms for chemical nickel plating production lines
4 Food and Pharmaceuticals
- Dosing and filling lifting mechanisms requiring high purity; nickel is non-toxic and poses no risk of metal ion leaching
- Complies with FDA food contact standards
5 Marine and Desalination
- Adjustment lead screws for desalination units
- Marine valve stems and deck lifting mechanisms
Products showcase
about our company
One-stop Nickel Processing Parts Factory in China
We Baoji Reliab Metal Material Co.,Ltd was founded in year 2014, located in the famous 'China Titanium Valley--BAOJI', under the strong R&D ability and continuously development, our mainly products have including nickel&nickel alloy bars/rods, plates, tubes, forgings, fasteners&machined parts, also zirconium and nickel products.
We have passed the Quality System Certificate of ISO 9001-2015, aiming for the satisfactions of different customers' requests.
Our testing equipments
contact us
E-mail: garychen3215@hotmail.com
Address: No.35, Baoti Rd, Baoji city, Shaanxi Province, China
Contact: Mr. Gary Chen
Phone: +86-917-8883215
Mobile/WhatsApp: +86 13092900605
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