Page 309 - MiSUMi 2025

Economy series Alteration Options / Peripheral Products Lead Accuracy Grade Economy series
Ball Screws Ball Screws

QAlthough the machining is carried QAlteration Options QBall Screw Lead Precision
out according to the standard shaft Allowable value of representative travel
end by default, there are a variety of · Alteration options for the · Alteration options for Actual Travel (la) Effective Thread Length (lu) Nominal Travel (lo) error (±ep) and variation (Vu) Unit: μm
support side shaft end
the fixed side shaft end
alterations that can be specified. + Line Line Screw Effective Accuracy grade
No Machining on Support Wrench Flats on Fixed Side Representative Travel (lm) Standard Travel (ls) Length (mm) C3 C5 (Economy series)
· Both the support side and the fixed side are Side Shaft End 0’ Line Line Representative Representative
shipped after machining according to the 0 More than or Less Travel Distance Variation Travel Distance Variation
Error
Error
assembly dimensions with the applicable t 315 12 8 23 18
support unit. code: NC code: SZC Travel Distance Error - v 300 315 400 13 10 25 20
10
15
400
20
27
500
3 Ball Nut Orientation Reversed Keyway Machined on Fixed v2π ep 500 630 16 12 30 23 3
Side Shaft End
(Support side) (Fixed side)
800
35
13
630
18
25
800
Standard 2π 300mm vu 1000 1000 21 15 40 27
Ball Screws / Lead Screws Change code: RLC code: KC 1250 1600 29 18 54 35 Lead Screws Ball Screws /
1250
16
46
30
24
Meaning
Terms
No Retaining Ring Groove
300mm and pitch periodic error (V2π)
on Support Side Shaft End Keyway Machined on Actual Mean Symbols A value that is Specified Travel subtracted from Actual Standard value of variation (V300) relative to displacement Unit: μm
Fixed Side Shaft End
ep
Travel Error Mean Travel. Accuracy grade C3 V2π C5 (Economy series) C7 (Economy series) C10
That maximum difference of the actual travel contained
Standard
Rolled Ball Screws Change Variation u300 travel, and is defined by three parameters below. EC7(Economy series) representative distance error (ep) can be calculated Screws Rolled Ball
between two lines drawn parallel to the actual mean
Item
V2π
V300
V300
V300
V300
52
6
18
8
210
Standard value
8
Variation for the effective thread length of screw shaft.
uu
Variation for an arbitrarily taken length of 300mm within
the effective thread length of screw shaft.
code: KLC
code: RNC
within the effective thread length of screw shaft.
P.03-009 · Detailed dimension of alteration KC·KLC keyway Change Support Side Shaft Flat Machined on Fixed Side Specified u2Q Variation for an arbitrary one revolution (2πrad) taken based on ep=2·lu/300·V300. P.03-009
Axial travel compensated for temperature rise and loading
ls
Travel
conditions, in relation to the Nominal Travel (Lead).
Precision Ball Screws 6.3 b t Shaft Nominal Tolerance Nominal t Tolerance Specified t A value that is Nominal Travel subtracted from Specified Screws Precision Ball
End Machining
Shaft End
Travel, over the effective thread length.
b
This value is set to compensate for possible screw shaft
Travel Target
expansion and contraction due to temperature changes
Value
and applied loads. The value is to be determined based
Dia.
(N9)
Actual measured travel distance.
P.03-027 8~10 Dimensions -0.004 Dimensions code: GC code: SC Actual Travel la on experiments or experiences. P.03-027
6~7
1.2
2
-0.029
A straight line representing the actual travel trend.
Ball Screw Supports / Motor Brackets 11~12 4 5 6 -0.03 2.5 +0.1 Change Support Side Shaft Travel lm other approximation methods from the curve representing Motor Brackets Ball Screw Supports /
1.8
3
Actual Mean
A straight line obtained by the least-squares method or
0
the actual travel.
End Length
0
3.0
13~17
18~20
3.5
P.03-047 code: FC QBall Screws runing noise level Ball screw noise level is affected by several important factors: P.03-047
Factor
Low level
High level
noise level
Ball Screws noise level is affected by several important factors:
Lead Screws * For details of the machining content, please visit MISUMI official website. - The figures below are ball screws noise levels by specification. 1 Precision grade High precision Low precision Lead Screws
Small
2 Diameter
Big
- Results are for reference and may not cover all spectification.
Short
3 Lead
Long
- MISUMI C7 grade ensures under 70 dB at 1500 RPM.
Fast
Slow
4 Rotary speed
P.03-058 · Economy series Support Units and Economy series Motor Brackets can also be purchased. (noise measured 1 meter from the ball screws) 5 Assemble accuracy Good Poor P.03-058
Economy series Support Units
Economy series Motor Brackets (P.03-056)
Lead Screw Nuts Support side Fixed side Square-Narrow Pitch Type (P.03-052) servo motor stepper motor 80 Ball Screw noise and precision grade relationship 80 Ball Screw noise and diameter relationship 80 Ball Screw noise and lead relationship Nuts Lead Screw

Square-Standard Type (P.03-051)
Applicable
Applicable
Fixed side
Support side
P.03-077 dB 70 dB 70 dB 70 P.03-077
Lead Screw Supports Round Type (P.03-053) Low Profile Type (P.03-054) 50 900 1200 1500 1800 2100 2400 2700 60 900 1200 1500 1800 2100 2400 2700 50 900 1200 1500 1800 2100 2400 2700 Supports Lead Screw
60
60
50
C7 Ball Screw
RPM
Lead 20
dia 20
P.03-079 Support side Fixed side Support side Fixed side 1. Noise level in different ball screw precision grade 2. Noise level in different ball screw diameter RPM 3. Noise level in different ball screw lead RPM P.03-079
Lead 5
C5 Ball Screw
dia 15
Lead Screw Stop Plates / Position Indicators - Test pieces : C5 and C7 Ball screw, Dia 20mm, lead 20mm - Test pieces: C7 ball screw, lead 20, diameter 15 and 20 - Test pieces: C7 grade, diameter 15mm, lead 5 and 20 Position Indicators Lead Screw Stop Plates /
- The higher the precision, the lower noise.
- The shorter lead the lower noise.
- The smaller diameter, the lower noise
- MISUMI ball screws are available from dia 4mm to 50mm
- MISUMI ball screws are available in multible lead
- MISUMI ball screws are available in both C5 and C7 grades.
P.03-081 P.03-081
03-011 03-012