Author: ellis.h.mcgaughy-1@... Time: Sun Aug 5, 2001 4:17 am PDT Link
Fellow builders,
I am frustrated (to say the least) and need some help. I have been
drilling (reaming) out my HS hinge brackets in order to mount them to
the Jig. As you know, the attachment is (should be) a #3 (or 3/16")
size bolt. I have some AN3 bolts that I plan to use.
I reamed the holes first with a #12 drill to clean the paint out of
the bracket holes. The bolts were too large to go through. To
experiment further, I ran a 3/16" drill through the holes .... and
the clearance seemed to get better (but it shouldn't have because a
3/16" drill is smaller than a #12!). But, the bolts still won't go
through. I got the #12 drill bits from Avery .... and I checked with
a magnifying glass last night that, sure enough, they are
marked "12." The AN3 bolts came from Aircraft Spruce just a few
weeks ago.
Are AN3 bolts typically larger than 3/16" by a small amount?
Help Please!
I plan to borrow a micrometer and check the drill bit sizes and bolts.
Author: "Dick Isherwood" <risherwood@...> Time: Sun Aug 5, 2001 5:56 am PDT Link
Ellis,
I reamed mine with a #12 and it worked fine.
I just went out to the hanger (garage) and drilled a 3/16" and a #12
in a old HS-610 (don't! ask) and a AN3 fit in both holes. I measured
the bolt it is .187 (3/16" = .1875) and the #12 drill shank was .187!
but acording to the chart a #12 should be .189! the actual drilling
flutes are probably larger than the shank.
Have you tried the AN3's that Van's sent with the emp.?
Dick
RV-7 N797RV (reserved)
> Fellow builders,
>
> I am frustrated (to say the least) and need some help. I have been
> drilling (reaming) out my HS hinge brackets in order to mount them
to
> the Jig. As you know, the attachment is (should be) a #3 (or 3/16")
> size bolt. I have some AN3 bolts that I plan to use.
>
> I reamed the holes first with a #12 drill to clean the paint out of
> the bracket holes. The bolts were too large to go through. To
> experiment further, I ran a 3/16" drill through the holes .... and
> the clearance seemed to get better (but it shouldn't have because a
> 3/16" drill is smaller than a #12!). But, the bolts still won't go
> through. I got the #12 drill bits from Avery .... and I checked
with
> a magnifying glass last night that, sure enough, they are
> marked "12." The AN3 bolts came from Aircraft Spruce just a few
> weeks ago.
>
> Are AN3 bolts typically larger than 3/16" by a small amount?
>
> Help Please!
>
> I plan to borrow a micrometer and check the drill bit sizes and
bolts.
Author: "Scott Morton" <mortonsf@...> Time: Sun Aug 5, 2001 6:06 am PDT Link
I also used the 3/16 drill for the AN3 bolts from Vans and found a
firm fit with nearly no slop . . . Maybe your AN3 bolts have a burr on
them near the end of the threads?
-----Original Message-----
From: Dick Isherwood [mailto:risherwood@c...]
Sent: Sunday, August 05, 2001 8:56 AM
To: RV7and7A@yahoogroups.com
Subject: [RV7and7A] Re: Drill sizing
Ellis,
I reamed mine with a #12 and it worked fine.
I just went out to the hanger (garage) and drilled a 3/16" and a #12
in a old HS-610 (don't! ask) and a AN3 fit in both holes. I measured
the bolt it is .187 (3/16" = .1875) and the #12 drill shank was .187!
but acording to the chart a #12 should be .189! the actual drilling
flutes are probably larger than the shank.
Have you tried the AN3's that Van's sent with the emp.?
Dick
RV-7 N797RV (reserved)
> Fellow builders,
>
> I am frustrated (to say the least) and need some help. I have been
> drilling (reaming) out my HS hinge brackets in order to mount them
to
> the Jig. As you know, the attachment is (should be) a #3 (or 3/16")
> size bolt. I have some AN3 bolts that I plan to use.
>
> I reamed the holes first with a #12 drill to clean the paint out of
> the bracket holes. The bolts were too large to go through. To
> experiment further, I ran a 3/16" drill through the holes .... and
> the clearance seemed to get better (but it shouldn't have because a
> 3/16" drill is smaller than a #12!). But, the bolts still won't go
> through. I got the #12 drill bits from Avery .... and I checked
with
> a magnifying glass last night that, sure enough, they are
> marked "12." The AN3 bolts came from Aircraft Spruce just a few
> weeks ago.
>
> Are AN3 bolts typically larger than 3/16" by a small amount?
>
> Help Please!
>
> I plan to borrow a micrometer and check the drill bit sizes and
bolts.
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