2
Model
RA - 151E
Maximum rotating
speed at the tool
For Air Motor
7,200min
-1
(rpm)
For Brushless Motor
7,490min
-1
(rpm)
Maximun Motor
Rotation Speed
For Air Motor
19,000min
-1
(rpm)
For Brushless Motor
20,000min
-1
(rpm)
Applicable Motor
For Air Motor
AM - 3020R / L, AM - 3020RA / LA
For Brushless Motor
EM - 3060, EM - 3060J, EM - 3060J - 2M, EM - 3030J,
EM - 3030J - 2M
Reduction Ratio
1 / 2.67
Standard Collet Chuck (CH8 - 3.0)
ȭ
3.0mm
Weight
385g
3 - 1 Specifications
3
. SPECIFICATIONS AND DIMENSIONS
①
Do not exceed the maximum allowable motor speed of 20,000min
-1
(rpm).
②
Do not drop or hit this spindle, as shock can damage to the internal components.
③
Be sure to clean the collet chuck, the inside of the Spindle before replacing the tool. If ground
particles or metal chips stick to the inside of Spindle or the collet chuck, damage to the collet
chuck or Spindle can occur due to the loss of precision.
④
When cleaning a Spindle, stop the motor and remove debris with a soft brush or a cloth. Do
not blow air into the Spindle with compressed air as foreign particles or cutting debris may
get into the ball bearing.
⑤
Always clean the tool shank before installing the tool in the Spindle.
⑥
When sizing the correct collet chuck size to the tool shank diameter, a tolerance of + 0
〜
- 0.01mm
is strongly recommended. A tool shank within the + 0
〜
- 0.1mm range is mountable, however,
this may cause poor concentricity and or insufficient tool shank gripping force.
⑦
Select suitable products or tools for all applications. Do not exceed the capabilities of the
Spindle or tools.
⑧
During supply of coolant spray, do not stop the supply air pressure.
If stop the supply air pressure, entering coolant spray to internal Air Turbine Spindle by lost
air purge. This may occur damage to the Air Turbine Spindle.
⑨
Carefully direct coolant spray to the tool. Do not spray directly on the Spindle body.
⑩
Stop working immediately when abnormal rotation or unusual vibration are observed.
Immediately, please check the content of section " 10. TROUBLESHOOTING ".
⑪
Always check if the tool, collet chuck are damaged before and after operating.
⑫
If the collet chuck show signs of wear or damage, replace it before a malfunction or additional
damage occurs.
⑬
After installation, repair, initial operation, or long periods of non operation, please refer to
section " 8. BREAK-IN PROCEDURE " detailed in Table 1. When checking the Spindle, no
vibration or unusual sound should be observed during rotation.
⑭
Do not disassemble, modify or attempt to repair this Spindle. Additional damage will occur
to the internal components. Service must be performed by NSK NAKANISHI or an authorized
service center.
⑮
When using this Spindle for mass production, please consider the purchase of an additional
Spindle to be used as a back-up in case of emergency.
CAUTION
2
. FEATURES
①
The RA - 151E is capable of working on corners difficult to work or unfit for working with straight type Spindle.
②
The Spindle housing is made from precision ground, hardened, stainless steel (SUS) with an outside diameter
of
ȭ
30mm.
③
Various sizes of collet chucks are available CH8 0.8mm - 3.0 mm. Standard collet chuck is CH8 3.0 mm or CH8
3.175mm. (For U.S. market CH8 3.175mm.)
