Page 347 - MiSUMi 2025

Economy series Precautions of Assembling Precautions of Assembling Economy series
Support Units Support Units

M Nut Tightening M Nut Tightening
Torque (N · cm)
Torque (N · cm)
4 160 12 1370
5 200 15 2350
6 245 20 4700
8 490 25 8430
10 930 EValue is for reference only.
4. Precautions When Installing the Bearing Lock Nut
Lightly tighten the bearing lock nut. As a guideline, apply approximately 1/3 of the recommended tightening torque (refer to the table).
Support the screw shaft using a V-block, and align a dial gauge fixed in place with a jig at point A or B.
A Dial indicator
3 3

B
Ball Screws / Lead Screws V Block Lead Screws Ball Screws /

5. Installation and Accuracy Check of the Support Side Bearing
If the dial gauge needle shows runout, gently tap the bearing lock nut with a hammer to reduce the needle fluctuation.(During this process,
Rolled Ball Screws Align the table with the support-side bearing to ensure proper centering. Move the table back and forth to adjust for smooth overall motion. Screws Rolled Ball
ensure the screw shaft is held in place without contacting the support unit to avoid transmitting impact.)
While checking the accuracy of each component, fully tighten the mounting bolts. If the adjustment is unstable, repeat the previous steps.
Table
P.03-009 Confirm the deflection. P.03-009
Precision Ball Screws Confirm the tightening torque. Screws Precision Ball

P.03-027 Measure a travel distance. Main Body P.03-027
Ball Screw Supports / Motor Brackets Precautions When Installing the Support Units Motor Brackets Ball Screw Supports /

When inserting into the fixed-side support unit, the fit may vary between smooth insertion and light press-fit (transition fit). In the case of a

Do not strike the inner ring of the bearing or the outer surface of the support unit housing.
P.03-047 light press-fit: Do not tilt the bearing during insertion. P.03-047
If there is an interference fit between the shaft and the inner ring, use a suitable spacer and press or jack the bearing in slowly and evenly.
Lead Screws If galling occurs, do not force the insertion. Immediately remove the unit, correct any swelling on the shaft, and reassemble. Lead Screws
Take care to minimize shock to the bearing as much as possible.Also, be cautious of any bending of the screw shaft.

P.03-058 P.03-058
Lead Screw Nuts Nuts Lead Screw

P.03-077 P.03-077
Lead Screw Supports Good Bad Supports Lead Screw

P.03-079 QStore Accessories with care since they are required when assembling. P.03-079
Lead Screw Stop Plates / Position Indicators Accessory packaging Accessory contents <fixed side> Accessory contents <support side> Position Indicators Lead Screw Stop Plates /

E In some MISUMI
ball screw models,
as an accessory.
P.03-081 a collar is provided P.03-081
Part Number In such cases, one
collar may remain
Collar Bearing Nut unused. Bearing Retaining Ring
03-049 03-050