I needed a simple sprocket to use as a guide for cutting splines. This is how the LBS experience went: (copy and paste from the freewheel spline thread.)
Luke- Hello sir, I'm looking for a sprocket out of a cassette that fits on a 9spd hub. The condition doesn't matter, as it will just be used as a template.
LBS- We don't have template sprockets.
Luke- I would imagine not, but any sprocket that slides onto a 8-9spd shamano rear hub will do fine for me.
LBS- There are no individual sprockets for a 8-9spd hub, they come in a cluster called a cassette, and you can't disassemble them.
Luke- I'm just looking for one to use as a template and guide for my file. Aren't the little ones on the end of the cassette normally not riveted to the rest due to diameter limitations? Do you have one laying about somewhere? I will gladly buy it.
LBS- We don't sell any used parts here. Unacceptable liability. We also don't have any template sprockets, and I've never even heard of such a thing.
Luke- It's not a unique species of part, just a unique application for a part you must deal with on a daily basis. I'm simply using it for a guide to file some splines into the mounting threads of a BMX freewheel so they can slide onto 9spd rear hub splines. (In retrospect, I never should have mentioned this part, as it just blew his mind)
LBS- BMX freewheels don't mount onto 9spd rear hubs, and it would defeat the whole purpose of having a 9spd hub.
Luke- I need it to freewheel independently of the rotation of the splined freewheel built into the hub. It's for a motorized bicycle application, and I'm trying to avoid the motors from spinning the pedals when it runs, and the pedals from spinning the motor.
LBS- I've got BMX hubs, and the BMX freewheel will mount right onto them. I can lace one into a mountain bike rim for you.
Luke- That would only give me a single rear freewheel, which doesn't solve the problem of the motor spinning the pedals, or the pedals spinning the motor.
LBS- You shouldn't have a motor on your bike to begin with, it's for lazy people.
Luke- It's also for people who get sleepy from riding at 15-25mph, and I'm not all that fond of pedaling.
LBS- You should get a motorcycle then.
Luke- I have 4 motorcycles. This fills a different variety of niche in my transportation equipment.
LBS- (now for some reason he is getting huffy-puffy with me) Well pal, I've got bad news for you. BMX threads are larger diameter than a 9spd spline, so what you want to do isn't even possible.
Luke- They are close, but there is just enough material in the ID of the BMX freewheel to make some strong splines.
LBS- No there isn't, I've been working on bikes for 15 years, I KNOW. Also, you can't cut splines on the inside of something, they have to stamp the sprockets out to get the splines on them.
Luke- I assure you there is room. I've seen the completed work of a friend who has done it all ready. Also, it's called broaching, or using a file to broach, and you can certainly cut ID splines in anything you like if you are clever. I've all ready done it for my E-bike.
LBS- Are you calling me stupid? If you've all ready done it, then WTF are you here talking to me for?
Luke- In my E-bike, I did it to a large diameter 96T sprocket, not the inside of a freewheel. Can I please just buy a sprocket from a cassette? It seems like we are getting no where by talking about it, and I don't have a lot of time to spend right now.
LBS- Large sprockets have large open centers, not splined centers. And I told you I don't sell used parts, the liability remember?
Luke- Ok, then your cheapest cassette please.
LBS- Here you go ( grabs a box under the counter), it's $58.
Luke- Hmm... That seems like a little more than I was looking to spend for a template.
LBS- I told you, we DONT SELL TEMPLATES!
Luke- Ok, I think I will try somewhere else... (turning around to leave)
LBS- Thank's for wasting my time with your stupid questions about making a slow ass heavy POS motorized bike!
Luke- * resisting urge to jump over the counter and RNC (rear naked choke) this old bike shop guy into sleepy time. * *resisting* *resisting urge* *resisting...* Finally, I say, "Likewise", and walk outside to my car.