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News

25.09.2014 | We invite you to visit our stand at the exhibition "Mashex-2014"!

Get an e-ticket to the exhibition "Mashex-2014"Dear Partners and Clients!

We invite you to visit our stand №C261, hall №3 at the 17th international exhibition of equipment and technologies of metalworking and working of composite materials "Mashex-2014", which will be organized from 28 to 31 October in the exhibition center "Crocus Expo", pavilion №1, Moscow, Russia.

24.09.2014 | We invite you to visit our stand at the exhibition "Stankostroenie-2014"!

Get an e-ticket to the exhibition "Stankostroenie-2014"Dear Partners and Clients!

We invite you to visit our stand №В222 , pavilion №1, hall №2 at the international specialized exhibition "Stankostroenie-2014", which will be organized from 14 to 17 October, 2014 in the exhibition center "Crocus Expo" (Moscow, Russia).



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Main characteristics


 

 

Features of QH seriesс

  1. Low noise level. Noise level reduction became possible by applying SynchMotin technology - the rolling elements (balls) are located between the dividers (separators) causing the contact and possible collision between the balls are eliminated, the circulation of rolling elements in the system is improved, that leads to the noise level reduction.

  2. Self-lubricating design. The partitions between rolling elements are designed as the hollow rings with a through hole to ease the lubricant circulation. The special design of the lubricant path reduces the frequency of the lubricant reservoir replenishing. The rail guideways of QH series are supplied as the pre-lubricated. A productivity testing at 0,2C (the dynamic load) showed that after the 2500km damage of the rolling elements and the circulation path is not revealed.

  3. Smooth movement. In standard linear guideways the rolling elements collide with each other when they start a moving, creating a friction force. This causes an increase of the resistance to the rolling. Due to SynchMotion technology, the profile rail guideways of QH series by Hiwin brand prevent this condition. When the block starts moving, the rolling elements begin their rolling consistently without touching each other, thus keeping the kinetic energy of the rolling elements and reducing resistance force to the rolling.

  4. High productivity (speed). QH series shows the high speed characteristics and maximum productivity, due to SynchMotin technology. It is used for separating the adjacent balls thus resulting the low data of adhesion and friction between the adjacent balls.

Accuracy classes

Accuracy classes of QH series are classified into:

  • - normal (C),
  • - high (H),
  • - precision (Р),
  • - super precision (SP),
  • - ultra precision (UP).
The choice depends on the equipment requirements.

Accuracy classes of non-interchangeable system

Accuracy of non-interchangeable guideways
Item QH-15,20 QH-25,30,35 QH-45
Accuracy Classes C H P SP UP C H P SP UP C H P SP UP
Dimensional tolerance of height H ±0.1 ±0.03 -0.03 -0.015 -0.008 ±0.1 ±0.04 -0.04 -0.02 -0.01 ±0.1 ±0.05 -0.05 -0.03 -0.02
Dimensional tolerance of width N ±0.1 ±0.03 -0.03 -0.015 -0.008 ±0.1 ±0.04 -0.04 -0.02 -0.01 ±0.1 ±0.05 -0.05 -0.03 -0.02
Variation of height H 0.02 0.01 0.006 0.004 0.003 0.02 0.015 0.007 0.005 0.003 0.03 0.015 0.007 0.005 0.003
Variation of width N 0.02 0.01 0.006 0.004 0.003 0.03 0.015 0.007 0.005 0.003 0.03 0.02 0.01 0.007 0.005
Running parallelism of block surface C to surface A Watch the table "Accuracy of Running Parallelism"
Running parallelism of block surface D to surface B

 

 Accuracy classes of interchangeable system

Accuracy of interchangeable guideways
Item QH-15,20 QH-25,30,35 QH-45
Accuracy Classes C H P C H P C H P
Dimensional tolerance of height H ±0.1 ±0.03 ±0.015 ±0.1 ±0.04 ±0.02 ±0.1 ±0.05 ±0.025
Dimensional tolerance of width N ±0.1 ±0.03 ±0.015 ±0.1 ±0.04 ±0.02 ±0.1 ±0.05 ±0.025
Variation of height H 0.02 0.01 0.006 0.02 0.015 0.007 0.03 0.015 0.007
Variation of width N 0.02 0.01 0.006 0.03 0.015 0.007 0.03 0.02 0.01
Running parallelism of block surface C to surface A Watch the table "Accuracy of Running Parallelism"
Running parallelism of block surface D to surface B

 


Accuracy of Running Parallelism

Rail Length (mm)
Accuracy (μm)
C H P SP UP
100 12 7 3 2 2
100-200 14 9 4 2 2
200-300 15 10 5 3 2
300-500 17 12 6 3 2
500-700 20 13 7 4 2
700-900 22 15 8 5 3
900-1100 24 16 9 6 3
1100-1500 26 18 11 7 4
1500-1900 28 20 13 8 4
1900-2500 31 22 15 10 5
2500-3100 33 25 18 11 6
3100-3600 36 27 20 14 7
3600-4000 37 28 21 15 7

Preload

Preload QH

Definition

The preload can be set for each profile rail guideway. For this purpose oversized balls are used. Usually a negative clearance between the rolling surface and balls is used in the profile rail guideways for increase of the rigidity and accuracy. The curve shows that rigidity doubles with the strong preload. To avoid premature wear of the system, the preload over ZA type is not recommended for profile guideways, size of which is less than 20.

 

Preload classes

There are three types of standard preload for different application conditions.

Class Code Preload Condition Examples of Application
Light Preload Z0 0-0.02C

Certain load direction,low impact, low precision required

Transportation devices, auto-packing machines, X-Y axis for general industrial machines, welding machines, welders

Medium Preload ZA 0.05C-0.07C High precision required

Machining centers, Z axis for general industrial, machines, EDM, NC lathes, Precision X-Y tables, measuring equipment

Heavy Preload ZB 0.10C-0.12C

High rigidity required, with vibration and impact

Machining centers, grinding machines, NC lathes, horizontal and vertical milling machines, Z axis of machine tools, Heavy cutting machines

 

"C" means the dynamic load capacity in the column "Preload".

Class Interchangeable Guideway Non-Interchangeable Guideway
Preload classes Z0, ZA Z0,ZA,ZB