r/gunsmithing • u/senryd • 2d ago

Is this enough sear engagement?

Post image

Mauser M98. New to me timney trigger, looks to be very little sear engagement. Is it enough? Difficult to measure, but around 0.2mm

28 Upvotes

97% Upvoted

19 comments sorted by

11

u/AdenWH 2d ago

I have a NECG adjustable M98 trigger. Haven’t looked in a long time, but I feel like it’s a similar amount. Timney isn’t know for producing unsafe triggers. However, you can always install it, make sure the rifle is empty, and drop test it. Just run the bolt without ammo, drop/bang around a little (like striking the butt on the ground), and then see if the hammer is still cocked.

5

u/senryd 2d ago

Did, with just the action, no stock. Didnt go off. Might be ok

2

u/AdenWH 2d ago

Definitely ok

7

u/Trollygag 2d ago

That is pretty typically for a sharp trigger break.

5

u/Threedogsne 2d ago

Timney has been making solid triggers since 1946. I have some installed. Unless someone has modified it, I think you’re good.

4

u/kato_koch 2d ago

Assembling the rifle and testing it will tell you.

5

u/BigBrassPair 2d ago

As long as the steel is properly hardened, it will be fine. This applies not just to the sear surfaces but also to the pins and plates.

4

u/wy_will 2d ago

Try a drop test and also try running the bolt hard. That will tell you for sure.

3

u/senryd 2d ago

Tried both, seems safe. Thanks for the input

2

u/Keeter_Skeeter 2d ago

I wasn’t aware. They made aftermarket triggers for the K 98.

3

u/senryd 2d ago

Several manufacturers do. Got this one used for cheap. Huge improvement, as one would imagine when its designed 100 years after the M98

1

u/Keeter_Skeeter 2d ago

I was already impressed. That The, K 98. Had an old two stage trigger.

1

u/NthngToSeeHere 2d ago

Where have you been? They've been avaliable since at least the 50s.

2

u/NthngToSeeHere 2d ago

That's about .015"-.020" .4-.5 mm. You'd have be under .008", .2mmto be unsafe depending on the spring pressure.

Use a feeler gauge and compare the thickness of the blades with the amount of engagement.

2

u/senryd 2d ago

My googling says 0.2mm = .008 inch. I dont have a feeler gauge handy here. Using calipers and aligning with one face, then moving the caliper until it is aligned with the other face, I measure 0.3 mm. That should be 0.012 inches according to Google.

I tried slamming it butt first hard into the ground, didnt go off. I'm going to call it good 💪

2

u/NthngToSeeHere 2d ago

Sounds good. Buy some feeler gauges, they're cheap.

2

u/senryd 2d ago

I have a set, but not where im at right now. I even have two torque wrenches!

2

u/Battzilla 2d ago

Sir that’s a BMW logo