Fridge just died, so replaced with shiny new Which best buy Samsung.

Decided to reverse hinges, book has full details but also dire warnings
about getting a man in.

M5 tapped holes on "other" side are covered by plastic sheet about 1 mm
thick, no way of getting screw to get through "unaided". So, ran through
a 4.2 mm drill. Tapped holes are there, but not very well tapped: screws
stick half way. Out with M5 tap and remove a significant amount of
metal. Also needed to increase clearance holes in brackets in order to
get screws aligned.

Otherwise a nice bit of kit, but anyone without taps and a range of
drills would have been stuffed. Ten minute job took half the evening.

In article ,
newshound writes
Fridge just died, so replaced with shiny new Which best buy Samsung.

Decided to reverse hinges, book has full details but also dire warnings
about getting a man in.

M5 tapped holes on "other" side are covered by plastic sheet about 1 mm
thick, no way of getting screw to get through "unaided". So, ran through
a 4.2 mm drill. Tapped holes are there, but not very well tapped: screws
stick half way. Out with M5 tap and remove a significant amount of
metal. Also needed to increase clearance holes in brackets in order to
get screws aligned.

Otherwise a nice bit of kit, but anyone without taps and a range of
drills would have been stuffed. Ten minute job took half the evening.

Any chance the screws might have been trilobal thread forming screws?
They don't look like conventional self tappers, superficially more like
standard threads but would have felt tight when forming the thread. Just
a thought.
--
fred
it's a ba-na-na . . . .

fred wrote in :

In article ,
newshound writes
Fridge just died, so replaced with shiny new Which best buy Samsung.

Decided to reverse hinges, book has full details but also dire
warnings
about getting a man in.

M5 tapped holes on "other" side are covered by plastic sheet about 1
mm
thick, no way of getting screw to get through "unaided". So, ran
through
a 4.2 mm drill. Tapped holes are there, but not very well tapped:
screws
stick half way. Out with M5 tap and remove a significant amount of
metal. Also needed to increase clearance holes in brackets in order to
get screws aligned.

Otherwise a nice bit of kit, but anyone without taps and a range of
drills would have been stuffed. Ten minute job took half the evening.

Any chance the screws might have been trilobal thread forming screws?
They don't look like conventional self tappers, superficially more
like
standard threads but would have felt tight when forming the thread.
Just
a thought.

+1

--

DerbyBorn

On 20/12/2013 09:21, DerbyBorn wrote:
fred wrote in :


Any chance the screws might have been trilobal thread forming screws?
They don't look like conventional self tappers, superficially more
like
standard threads but would have felt tight when forming the thread.
Just
a thought.

+1

They were camming out even with new bits.

Given the torque I had to apply with the tap wrench, there was no way
self tappers or trilobes were going to work. The holes were clearly
tapped because a first tap went in a significant distance. They just
were not tapped sufficiently.

And the screws had flat tips which had no chance of penetrating the
plastic anyway.

Not enough quality control by the sound of it.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"newshound" wrote in message
o.uk...
Fridge just died, so replaced with shiny new Which best buy Samsung.

Decided to reverse hinges, book has full details but also dire warnings
about getting a man in.

M5 tapped holes on "other" side are covered by plastic sheet about 1 mm
thick, no way of getting screw to get through "unaided". So, ran through a
4.2 mm drill. Tapped holes are there, but not very well tapped: screws
stick half way. Out with M5 tap and remove a significant amount of metal.
Also needed to increase clearance holes in brackets in order to get screws
aligned.

Otherwise a nice bit of kit, but anyone without taps and a range of drills
would have been stuffed. Ten minute job took half the evening.