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Standard Spindle Units SPM100 Series
1.1 Structure and Parts Name
The following are the structures and part names of KOYO Standard Spindle Units SPM100 Series.
- ■Block type SPM100B
- ■Cartridge type SPM100C
【Parts Name】
- ①Main axis
- ②Front labyrinth collar
- ③Waterproof cover
- ④Front cover (with O-ring)
- ⑤Axle box
- ⑥Front bearings
- ⑦Outer ring spacer
- ⑧Inner ring spacer (A)
- ⑨Inner ring spacer (B)
- ⑩Front bearing nut
(with lock mechanism)
- ⑪Spacer (C)
- ⑫Rear Bearing
- ⑬Rear cover
- ⑭Rear labyrinth collar
- ⑮Rear bearing nut
(with lock mechanism)
- ⑯Parallel key
- ⑰Parallel key
(with lock mechanism)
1.2 Structure of Nominal Number
The nominal number of KOYO Standard Spindle Units SPM100 Series consists of the standard spindle unit code, series number, main axis diameter number, axlebox housing code, bearing structure code, etc.
●SPM100 Series Standard Spindle Units and Precision Rolling Bearings1.3 Models, Types and Specifications
Select according to applications.
- ■Block type
- ■Cartridge type
【SPM100 Series Spindle Unit models, types and specifications
[Note]N -kgf conversion 1N = 0.101972kgf 1kgf = 9.80665N
Bearing structure Spindle unit1)
nominal numberAxial diameter2)
（mm）Rigidity (reference value)
(N/μm)Maximum rotational
accuracy(μm)3)Regular use rotational
speed(min-1)Permissible (maximum) rotational
(min-1)Permissible axial load(static)
[kN {kgf}]Maximum temperature4) Radial Axial Radial
runoutAxial
runoutType B Type C Type B Type C A sequence
〈High rigidity〉SPM109 BA 45 130 570 3 3 4100 4500 5500 6000 17.6{1800} 15℃ CA SPM114 BA 70 280 1000 2600 3000 3500 4000 35.3{3600} CA SPM120 BA 100 450 1200 1200 2100 2500 2800 58.8{6000} CA B sequence
〈High rigidity〉SPM109 BB 45 130 210 3 2 6000 6800 8000 9000 8.8{900} CB SPM114 BB 70 280 310 3800 4100 5000 5500 19.6{2000} CB SPM120 BB 100 450 410 2900 3100 3800 4100 35.3{3600} CB E sequence
〈High speed and precision〉SPM109 BE 45 90 130 2 2 8200 9000 11000 12000 9.8{1000} CE SPM114 BE 70 150 190 5300 5600 7000 7500 19.6{2000} CE SPM120 BE 100 290 250 3800 4100 5100 5500 35.3{3600} CE - （note）1）In the spindle unit nominal number, B represents the block type and C the cartridge type.
- 2) The axial diameter is the main axis dimension of the front bearing mounting portion.
- 3) The rotational accuracy indicates the runout of ↓→parts in the figure.
- 4) The temperature rise is the value on the axle box surface at the regular use rotating speed.
1.4 Dimension Tables
■Block type SPM100B
【Block type dimension tables】
Spindle Unit No. Main dimensions(mm） B B1 B2 D D1 D2 d1 d2 d3 H SPM109B 
CAD145 12.5 120 0-0.019
80120 0-0.013
30+0.0210
30+0.0180
1813 70 SPM114B CAD190 15.0 160 0-0.022
120160 0-0.016
50+0.0250
40+0.0210
3023 90 SPM120B CAD250 20.0 210 0-0.025
175220 0-0.019
80+0.0250
50+0.0250
4031 125 Spindle Unit No. Main dimensions(mm） H1 K1) L ℓ1 ℓ2 ℓ3 ℓ4 ℓ5 ℓ6 SPM109B 130 8×7×28ℓ 295 37 170 10 25 120 30 SPM114B 170 10×8×38ℓ 400 44 250 12 30 （95）2) 37 SPM120B 235 14×9×48ℓ 523 51 350 15 35 （140）2) 39 ■U type tip dimensions (optional)4)
Spindle Unit No. Tip dimension (mm) D5 D6 ℓ9 ℓ10 ℓ11 SPM109BU・CU 128 100 2 10 22 SPM114BU・CU 168 144 2 12 27 SPM120BU・CU 200 228 3 15 29 
■Standard pulleys (optional)
Spindle Unit No. Arrangements A and B Arrangement E SPM109B・C 3-3V、P.D. 80 4-7MS、P.D. 65 SSPM114B・C 4-3V、P.D.120 5-7MS、P.D.100 SPM120B・C 5-3V、P.D.150 6-7MS、P.D.120 
SPM100 series with standard pulleys (block type)
Spindle Unit No. Main dimensions(mm） Mass (summary)
（ｋｇ）Mounting3)
Boltsℓ7 ℓ8 M M1 N P Q SPM109B 38 20 M8 16 4-φ11 65 4-M16 24 4-M10 SPM114B 49 25 M10 20 6-φ14 100 6-M16 60 6-M12 SPM120B 59 30 M12 23 6-φ18 145 6-M20 152 6-M16 - 1) K represents the width x height x length of the parallel key.
- 2) The numbers of the mounting bolt holes are as follows.
SPM109B: Two points on one side (four points in total)
SPM114B and 120B: Three points on one side (six points in total) - 3) For mounting bolts, use hexagon socket head cap screws.
- 4) When you want to attach the spindle unit in vertical upward direction to use, specify the U type. (Optional)
■Cartridge type SPM100C
【Cartridge type dimension tables】
Spindle Unit No. Tip size(mm) D D1 D2 D3 D4 d1 d2 d3 SPM109C CAD0-0.019
80120 0-0.013
300-0.015
110165 +0.0210
30+0.0180
1813 SPM114C CAD0-0.022
120160 0-0.016
500-0.018
150205 +0.0250
40+0.0210
3023 SPM120C CAD0-0.025
175220 0-0.019
800-0.02
200265 +0.0250
50+0.0250
4031 Spindle Unit No. Tip size(mm) K1) L ℓ1 ℓ2 ℓ3 ℓ4 ℓ5 ℓ6 ℓ7 SPM109C 8×7×28ℓ 295 39 25 143 10 30 38 20 SPM114C 10×8×38ℓ 400 46 30 218 12 37 49 25 SPM120C 14×9×48ℓ 523 53 35 313 15 39 59 30 ■U type tip dimensions (optional)3)
Spindle Unit No. Tip dimension (mm) D5 D6 ℓ9 ℓ10 ℓ11 SPM109BU・CU 128 100 2 10 22 SPM114BU・CU 168 144 2 12 27 SPM120BU・CU 200 228 3 15 29 
■Standard pulleys (optional)
Spindle Unit No. Arrangements A and B Arrangement E SPM109B・C 3-3V、P.D. 80 4-7MS、P.D. 65 SSPM114B・C 4-3V、P.D.120 5-7MS、P.D.100 SPM120B・C 5-3V、P.D.150 6-7MS、P.D.120 
SPM100 series with standard pulleys (cartridge type)
Spindle Unit No. Main dimensions(mm） Mass (summary)
（ｋｇ）Mounting2)
Boltsℓ7 ℓ8 M M1 N P Q SPM109C M8 16 11 17.5 11 65 140 17.5 6-M10 SPM114C M10 20 11 17.5 11 100 180 43.0 6-M10 SPM120C M12 23 14 20.0 13 145 242 103.0 6-M12 - 1) K represents the width x height x length of the parallel key.
- 2) For mounting bolts, use hexagon socket head cap screws.
- 3) When you want to attach the spindle unit in vertical upward direction to use, specify the U type. (Optional)
1.5 Part Drawings
■Block type (SPM100 series)
All the main dimensions of A, B, E spindle units are the same.Only the bearing structures are different.
For the bearings used, "1.3 Models, Types and Specifications.■Cartridge type(SPM100 series)
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