Bi-directional ball screw consists of a screw shaft with a left and right thread and two ballnuts.This is a good choice when you need to move two ballnuts in opposite directions through a motor.
●ALM Bi-directional Ball Screw Basic Information
Diameter | Miniature bi-directional ball screw:4~16mm,large bi-directional ball screw:16~80mm |
Pitch | Miniature bi-directional ball screw:0.5~20mm,large bi-directional ball screw:2~32mm |
Material | Gcr15(HRC60~62),9Cr18(HRC55~58) |
Accuracy | C1,C3,C5,C7(JIS standard) |
Axial play | 0~0.005mm(Can be zero) |
Preload | P0,P1,P2,P3,P4 |
Efficiency | >90% |
Features | Clean and smooth,excellent surface finsh |
Certificates | ISO9001:2015,CE certificate,RoHS and reach compliance |
ALM provides custom service,ball screws can be manufactured according to customer requirements. |
●ALM Bi-directional Ball Screw Ballnut Types
The following shows ALM common bi-directional ballnut,other ballnuts can be manufactured according to customer's requirement.
Ballnut With Threaded Nose
Square Flanged Ballnut
Double-cut Flanged Ballnut
Round Flanged Ballnut
Ballnut With Keyway
Square Ballnut
●ALM Common Bi-directional Ball Screw Model
The following shows ALM commonly used standard and custom bi-directional ball screw models;other models can be manufactured according to customer drawings.
Lead Diameter | 1mm | 2mm | 2.5mm | 3mm | 4mm | 5mm | 6mm | 8mm | 10mm | 12mm | 15mm | 20mm |
4mm | ● | |||||||||||
5mm | ● | ● | ○ | |||||||||
6mm | ● | ● | ● | ● | ○ | ● | ||||||
8mm | ● | ● | ● | ● | ● | ○ | ||||||
10mm | ○ | ● | ○ | ● | ● | ● | ○ | ○ | ● | ○ | ○ | ● |
12mm | ○ | ● | ○ | ● | ● | ● | ○ | ○ | ● | ○ | ○ | ● |
14mm | ○ | ● | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
16mm | ● | ● | ● | ● | ● | ○ | ||||||
20mm | ○ | ● | ● | ● | ○ | ○ | ||||||
25mm | ● | ○ | ○ | ● | ○ | |||||||
32mm | ○ | ● | ● | ● | ● | ● |
★Customized Ball Screw Model:○ ★Standard Ball Screw Model:●
●ALM Bi-directional Ball Screw Advantages:
Clean and smooth;
Excellent surface finish;
More efficient:more than 90%;
High positioning accuracy:C1,C3,C5;
●ALM Bi-directional Ball Screw Intelligent Manufacturing and Inspection