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Strong Dust-proof SCNI/SCI Series Ball Screw

Home · Products · Ball Screw · Strong Dust-proof SCNI/SCI Series Ball Screw
  • Strong Dust-proof SCNI/SCI Series Ball Screw
Strong Dust-proof SCNI/SCI Series Ball Screw

Strong Dust-proof SCNI/SCI Series Ball Screw

The SCNI/SCI series ball screw is an enhanced, protected version of the cylindrical type (SCA series). While maintaining the space-saving advantages of a cylindrical nut, it integrates a highly efficient sealing system, providing a compact and robust precision transmission solution for compact equipment in environments with dust, debris, or liquid splashes, such as food processing, outdoor machinery, and woodworking equipment.

Inquiry
PREV: Flange Type SFI Series Ball Screw Next: Straight Cylinder Type SCA Series Ball Screw

Technology

The core value of this series lies in "building a reliable defense in a limited space." It simultaneously solves the two major challenges of space constraints and environmental protection, offering outstanding overall advantages

Characteristic Dimensions SCNI/SCI Series (Straight-Barrel Heavy-Duty Dust-Proof Type) Standard Straight Type (SCA Series) Flange-mounted heavy-duty dust-proof type (e.g. SFNU series)
Core Advantages Dual optimisation for environmental adaptability in confined spaces. Ultra-compact and flexible. Robust protection with straightforward installation.
Space Occupancy Compact radial dimensions retain straight-barrel structural advantages without protruding flanges. Small radial dimensions. Enlarged flange diameter for radial mounting dimensions.
Protection Capability Integrated multi-stage sealing system (scraper + labyrinth) effectively repels dust and debris ingress. Typically only basic dust protection, offering low protection level. Integrated multi-stage sealing system delivers superior containment.
Installation Flexibility Highly adaptable, accommodating diverse mounting methods including lock nuts and clamping sleeves for straightforward installation and fine-tuning within confined cavities. High. Fixed installation requiring dedicated flange mounting surface; moderate flexibility.
Environmental Adaptability Robustly engineered for compact, contaminant-prone operating environments. Low, suitable only for clean environments. Highly effective for contaminated operating environments.
Typical Application Scenarios Applications: Compact woodworking machinery, food packaging equipment, agricultural robotics, field inspection apparatus. 3D printers, desktop robots, clean laboratory instruments. Suitable for large machining centres, industrial production lines, and heavy machinery.

Dual Design Integration
Compact Structure: Uses a standard cylindrical nut, fixed with an external locking nut (collar) or clamping sleeve, saving installation space.
Powerful Sealing: Contact-type wiper seals and non-contact labyrinth seals are integrated at both ends of the nut, forming multiple lines of defense to ensure clean lubrication and block most contaminants.
Precision and Performance: As a rolled ball screw, the standard accuracy is typically C7 grade, providing reliable transmission efficiency and positioning accuracy. Preload options are available to eliminate axial clearance.
Specifications and Compatibility: Available in various shaft diameters and leads. The outer diameter is usually the same as the standard cylindrical (SCA) nut of the same specification, making it easy to directly upgrade and replace in existing compact designs, improving environmental resistance.

Application Scenarios
The SCNI/SCI series is an ideal choice for the following space-constrained and unclean environments:
Compact processing equipment: Small CNC engraving machines, desktop stone engraving machines, woodworking engraving machines.
Specialized automation equipment: Small sorting machines and packaging machines in the food industry; seeding or fertilizing modules in agricultural automation.
Outdoor and mobile equipment: Telescopic mechanisms for portable testing instruments, drive components for outdoor photography gimbals.
Industrial environments requiring cleanliness: Automation units near workshops in electronics factories, requiring dust protection but with limited installation space.

The SCNI/SCI series cylindrical, heavy-duty dustproof ball screw is the "multifunctional Swiss Army knife" among precision transmission components. It successfully provides compact devices with powerful environmental resistance without increasing their size. Choosing this series means you can obtain an optimal engineering solution for challenging design requirements—both compactness and durability—significantly improving the reliability and market applicability of your equipment in harsh conditions.

Parameters

Model No. d l Da Dimension Load Rating Rigidity Weight
D L L1 L2 M R n Ca(kgf) Coa(kgf) Kgf/um Kg
SCNI1605-4 16 5  3.175  30  45  9  20  5  3  1x4 1380  3052  33  0.146 
SCNI2005-4 20  5  3.175  34  45  9  20  5  3  1x4 1551  3875  39  0.17 
SCNI2505-4 25  5  3.175  40  45  9  20  5  3  1x4 1724  4904  45  0.226 
SCNI2510-4 10  4.762 46  85  13  30  5  3  1x4 2954  7295  51  0.664 
SCNI3205-4 32  5  3.175 46  45  9  20  5  3  1x4 1922  6343  52  0.252 
SCNI3210-4 10  6.35 54  85  13  30  5  3  1x4 4805  12208  62  0.784 
SCNI4005-4 40  5  3.175 56  45  9  20  5  3  1x4 2110  7988  59  0.406 
SCNI4010-4 10  6.35 62  85  13  30  5  3  1x4 5399  15500  72  0.932 
SCNI5010-4 50  10  6.35 72  85  13  30  5  3 1x4 6004  19614  83  1.21 
SCNI6310-4 63  10  6.35 85  85 13  30  6  3.5  1x4 6719  25358  95  1.52 
SCNI8010-4 80  10  6.35 105 85 13 30  8  4.5  1x4 7346 31953  109  2.292 
SCI1604-4 16  4  2.381  30  40  9  15  3  1.5 1x4 973  2406  32  0.14 
SCI2004-4 20  4  2.381  34  40  9  15  3  1.5  1x4 1066  2987  37  0.16 
SCI2504-4 25  4  2.381  40  40  9  15  3  1.5  1x4 1180  3795  43  0.22 
SCI3204-4 32  4  2.381  46  40  9  15  3  1.5  1x4 1296  4838  49 0.2 

Drawings


Production Capacity

Cyclone Milling Machines

LWN160-6000mm Leistritz Cyclone milling machines imported directly from
Germany, the ball screw shaft precision can be C3, C5, and C7 the max length
can be 7000mm

Rolled Thread CNC Machines

PR-40CNC Profiroll rolled thread ball screw machines imported directly from
Germany the ball screw shaft precision can be C5, C7 -C10

Rolled Thread CNC Machines

ST-20.2 and ST-347.7 rolled thread ball screw machines from TaiWan.
The ball screw shaft precision can be C7 - C10

Ball Screw Assembly Workshop

We conduct nut assembly in a constant temperature workshop,  all workers
having decades of work experience and zero clearance between the screw
and nut.

Ball Screw Assembly Workshop

One ball screw shaft matches one ball screw nut. Because each ball screw
shaft has a very tiny different tolerance. There are dozens of different
ball sizes for different screw shaft.
Our ball screw shaft and nut can be interchanged with the Taiwan
TBI ball screw shaft and nut very well.

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