Just found out my vintage tape deck needs a specific screw size to stay calibrated

I was messing with my Akai GX-630D reel to reel last week and noticed the playback speed kept drifting. Turns out there's a tiny set screw on the capstan motor that has to be exactly 2.5mm hex or it strips the threads. Found a forum post from some guy in Ohio who documented the whole fix with part numbers. Anyone else run into super specific fastener quirks on old gear?

2 comments

2 Comments

emery96515d ago

Respectfully, I gotta push back a little here. That forum guy in Ohio probably meant well, but I've been inside more tape decks than I care to count and 2.5mm hex is basically the standard for capstan motor set screws across most Japanese brands from that era. It's not really some obscure secret, it's just what they used on everything from Akai to Pioneer to Teac. The real trick is making sure you're using a GOOD quality hex key, not the cheap ones that come with furniture. Those will strip the threads every time cause they're slightly undersized. If you grab a Bondhus or Wiha driver, it'll fit snug and you won't have that issue. Your Akai is probably fine, just get the right tool and don't overtighten.

simonmoore8d agoMost Upvoted

Man, 100% this. I've stripped more set screws with those cheap silver hex keys than I want to admit. Once I switched to a Bondhus set, it was night and day. Never had a problem since.