No slots on Baltimore #9 Trucks.

I’m sprucing up a Baltimore #9.

Before I get the roller cast
I’d like to know why
this could roll on the ink—
out of sync with the trucks.

Should I retro fit the trucks with slots?


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Kelsey trucks aren’t slotted either.
In fact, I haven’t seen any small presses with trucks locking to the core.

Why is that?

One theory I heard, was that this provided a tiny bit more motion from the momentum, as the rollers travel across the small ink disk, letting them pick up a bit more ink. Not quite sure how it’s supposed to work, just passing along rumors.

Thanks, Oprion.
Makes me wonder then just what those pins are for.
I don’t think they are necessary for the string wrap
on a composition roller casting.

Pretty sure they are just there to stop the trucks from grinding against the composition. Kelsey rollers have similar truck stops.

How about something as SIMPLE as measuring the outer contact points of the studs and finding that the distance apart, is exactly the same es the distance of the INNER Roller Tracks, against the background of the cores being completely parallel, too simple a concept maybe.?

Adana,s in U.K. (not exactly Hi-Tech M/c,s) since a long time ago, have the Stocks/Cores turned with the Roller Hook circumference(s) obviously correct but, always *stepping up* with location shoulders, within the compound area, not exactly Rocket Science.?

Plus the Cord/String wound, compound adhesion system, >>That was Out of Date here U.K. many years ago.<<
NOW our Stocks/Cores are presented for recovering, Machined/Turned from good quality steel stock, always stepped down for the hook size, (built in track width)? Knurling or String winding was out a long time ago, the compound is chemically bonded.!!
Perhaps disregard most of the half-hearted, guesses and speculation, Contact your own Tarheel Roller& Brayer Co.. The very first paragraph of their on line, Spiel/Publicity certainly implies that they have been solving these issues for a long long time.

I have read and heard that trucks with slots fitting over pins were better at inking the form. I have a little Daughaday Model 1 Card Press (essentially a 3 x 5) and its roller cores and trucks came fitted with the pin and slot method. I am only assuming that these were the original rollers/trucks. (There was no roller material remaining on the cores, only the cord wrapping). At any rate, watching the action of the rollers going across the form in this little press made a believer out of me! This was confirmed when I watched repeatedly the same inking action on a Kelsey 6 x 10: sometimes I could detect a slight slurring motion of the rollers as they contacted the form on the Kelsey. Well, very slight. I am certain I have my roller height correct on the Kelsey and, admittedly, the quality of printing I was getting was the same on both presses. In other words, it did not seem to make a noticeable difference. But it might on certain forms! Thus armed, I tinkered with the Kelsey roller cores and trucks and retrofitted/converted them to have the slots and pins. Like Mick said early on in his note, some careful measuring is needed.

Print Print Print!


Jim, J. Thank you for your little nod to my humble effort, (unpatriotic, maybe) but “Tarheel” really do knock spots of our U.K. Smaller size, L/press re-furbishers/suppliers.?
As an afterthought, perhaps R.P. could publish a shot of his trucks, on the naked cores, with a stated length when the trucks are “home” against the stops, and a second shot of the actual distance between the inner surface of the rails, which by default, should be almost, the width of the chase.?
As the trucks pictured do not seem to be handed, perhaps it will show that when they are “home”! they May or may Not sit on the rails, 100%, possibly signifying aftermarket replacement.?
Jim, thanks again. Mick

I neglected to mention that the trucks fit snuggly
between the saddles and the pins. While long pins
function fine for centering the trucks a small pin
would do the same job.
The longer pins may provide more friction
up against the trucks thus driving the roller, I don’t know.

Thanks for giving this some thought, Jim.

I appreciate your giving it a stab & a poke, too, Mick,
but the point of the question had to do with the rollers
being driven rather than other functions the pins may serve.
(Who among us hasn’t ever become a bit puffed
over finding a solution for which there isn’t a real problem?)
But thanks for all the typing.

I hope someone with actual experience on this press
will chime in with some useful observations, like Jim’s.

It’s occurred to me that the rollers might’ve originally
been cast around the pins so that the rubber touched (clutched)
the trucks & the rollers got some turning torque.

Has anyone had experience printing with a #9?
Or does anyone have one in condition original enough
to guess where the roller ends were situated
in relation to the pins?

The Kelsey trucks and rollers we sell for the 5x8 and 6x10 presses have the trucks keyed to the roller core so that the roller turns as a unit. The trucks are slotted to engage a crimp on the roller core. The crimper we use originally came from Kelsey. We’ve sold several thousand of these rollers over the past 15 years.

For custom rollers for the table top presses other than Kelseys, we have a slot milled into the truck that engages a pin that goes through the roller core.

The C&P Pilot rollers and trucks are made in the same manner as the larger C&P presses in that the trucks are keyed to the roller core.