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Impact spanners

Impact spanners

High impact forces without nut damage

TMFN Series Impact Spanner

SKF impact spanners are designed for safe and easy tightening and loosening of locknuts used to secure and adjust larger bearings directly on the shaft or with adapter and withdrawal sleeves.

  • Avoids shaft and nut damage>/li>
  • Safe and user friendly
  • Impact applied effectively to the nut
  • Suitable for nuts of series KM, HM..T, HML..T, HM 30, HM 31, AN.., N.. and N... (for nut sizes 23 and above)
  • Special wide impact face
Design of TMFN 23-30 and TMFN 30-40

Design of TMFN 23-30 and TMFN 30-40

Design of other sizes TMFN impact spanners

Design of other sizes TMFN impact spanners

Technical Data
DesignationLock nut outer diameter
mm in.
TMFN 23-30 150220 5.98.7
TMFN 30-40 195270 7.710.6
TMFN 40-52 250320 9.812.6
TMFN 52-64 330400 12.615.7
TMFN 64-80 420520 15.720.5
TMFN 80-500 540620 21.324.8
TMFN 500-600 630730 24.829.5
TMFN 600-750 750950 29.537.4

Selection table
DesignationSuitable for adapter sleevesSuitable for nuts of series
H 23, H 31,H 30,
H 32 H 39 KM KML HM T
TMFN 23-30 2430 2632 2330 2632
TMFN 30-40 3040 3440 3238 3440
TMFN 40-52 4048 4452 40 42T50T
TMFN 52-64 5264 5668 52T56T
TMFN 64-80 6480 6888
TMFN 80-500 80500 88530
TMFN 500-600 500600 530630
TMFN 600-750 600750 670800

Selection table (continued)
DesignationSuitable for nuts of series
HM KMFE KMT DIN 1804 (M)
TMFN 23-30 2328
26L28L
2430M105x2
M105x2
M110x2
M115x2
M120x2
M125x2
M130x3
M140x3
M150x3
M160x3
TMFN 30-40 3040 3240 M170x3
M180x3
M190x3
M200x3
TMFN 40-52 30443052 40, 44, 48
TMFN 52-64 30563068
TMFN 64-80 31683088
TMFN 80-500318430/500
TMFN 500-600 31/50030/630
TMFN 600-750 31/60031/800