Impact spanners

High impact forces without nut damage

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 other sizes TMFN impact spanners

Technical Data
Designation	Lock nut outer diameter
	mm	in.
TMFN 23-30	150�220	5.9�8.7
TMFN 30-40	195�270	7.7�10.6
TMFN 40-52	250�320	9.8�12.6
TMFN 52-64	330�400	12.6�15.7
TMFN 64-80	420�520	15.7�20.5
TMFN 80-500	540�620	21.3�24.8
TMFN 500-600	630�730	24.8�29.5
TMFN 600-750	750�950	29.5�37.4

Selection table
Designation	Suitable for adapter sleeves		Suitable for nuts of series
	H 23, H 31,	H 30,
	H 32	H 39	KM	KML	HM T
TMFN 23-30	24�30	26�32	23�30	26�32	�
TMFN 30-40	30�40	34�40	32�38	34�40	�
TMFN 40-52	40�48	44�52	40	�	42T�50T
TMFN 52-64	52�64	56�68	�	�	52T�56T
TMFN 64-80	64�80	68�88	�	�	�
TMFN 80-500	80�500	88�530	�	�	�
TMFN 500-600	500�600	530�630	�	�	�
TMFN 600-750	600�750	670�800	�	�	�

Selection table (continued)
Designation	Suitable for nuts of series
	HM	KMFE	KMT	DIN 1804 (M)
TMFN 23-30	�	23�28 26L�28L	24�30	M105x2 M105x2 M110x2 M115x2 M120x2 M125x2 M130x3 M140x3 M150x3 M160x3
TMFN 30-40	�	30�40	32�40	M170x3 M180x3 M190x3 M200x3
TMFN 40-52	3044�3052	�	40, 44, 48	�
TMFN 52-64	3056�3068	�	�	�
TMFN 64-80	3168�3088	�	�	�
TMFN 80-500	3184�30/500	�	�	�
TMFN 500-600	31/500�30/630	�	�	�
TMFN 600-750	31/600�31/800	�	�	�